diff --git a/EXTERNAL_CODES_coupled_with_SPECFEM3D/AxiSEM_for_SPECFEM3D/UTILS_COUPLING_SpecFEM/gll_library.f90 b/EXTERNAL_CODES_coupled_with_SPECFEM3D/AxiSEM_for_SPECFEM3D/UTILS_COUPLING_SpecFEM/gll_library.f90
index 067628639..df9fe2d7a 100644
--- a/EXTERNAL_CODES_coupled_with_SPECFEM3D/AxiSEM_for_SPECFEM3D/UTILS_COUPLING_SpecFEM/gll_library.f90
+++ b/EXTERNAL_CODES_coupled_with_SPECFEM3D/AxiSEM_for_SPECFEM3D/UTILS_COUPLING_SpecFEM/gll_library.f90
@@ -10,7 +10,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/README_HOWTO_COUPLING b/EXTERNAL_CODES_coupled_with_SPECFEM3D/README_HOWTO_COUPLING
similarity index 100%
rename from README_HOWTO_COUPLING
rename to EXTERNAL_CODES_coupled_with_SPECFEM3D/README_HOWTO_COUPLING
diff --git a/README_how_to_use_hybrid_specfem_axisem.txt b/EXTERNAL_CODES_coupled_with_SPECFEM3D/README_how_to_use_hybrid_specfem_axisem.txt
similarity index 100%
rename from README_how_to_use_hybrid_specfem_axisem.txt
rename to EXTERNAL_CODES_coupled_with_SPECFEM3D/README_how_to_use_hybrid_specfem_axisem.txt
diff --git a/README_how_to_use_hybrid_specfem_axisem_TOULOUSE_VERSION.txt b/EXTERNAL_CODES_coupled_with_SPECFEM3D/README_how_to_use_hybrid_specfem_axisem_TOULOUSE_VERSION.txt
similarity index 100%
rename from README_how_to_use_hybrid_specfem_axisem_TOULOUSE_VERSION.txt
rename to EXTERNAL_CODES_coupled_with_SPECFEM3D/README_how_to_use_hybrid_specfem_axisem_TOULOUSE_VERSION.txt
diff --git a/LICENSE b/LICENSE
index d511905c1..94a9ed024 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,285 +1,626 @@
-		    GNU GENERAL PUBLIC LICENSE
-		       Version 2, June 1991
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
 
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
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+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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-POSSIBILITY OF SUCH DAMAGES.
-
-		     END OF TERMS AND CONDITIONS
-
-	    How to Apply These Terms to Your New Programs
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
 
   If you develop a new program, and you want it to be of the greatest
 possible use to the public, the best way to achieve this is to make it
@@ -287,15 +628,15 @@ free software which everyone can redistribute and change under these terms.
 
   To do so, attach the following notices to the program.  It is safest
 to attach them to the start of each source file to most effectively
-convey the exclusion of warranty; and each file should have at least
+state the exclusion of warranty; and each file should have at least
 the "copyright" line and a pointer to where the full notice is found.
 
     <one line to give the program's name and a brief idea of what it does.>
     Copyright (C) <year>  <name of author>
 
-    This program is free software; you can redistribute it and/or modify
+    This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
+    the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
 
     This program is distributed in the hope that it will be useful,
@@ -303,37 +644,31 @@ the "copyright" line and a pointer to where the full notice is found.
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
-    You should have received a copy of the GNU General Public License along
-    with this program; if not, write to the Free Software Foundation, Inc.,
-    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 Also add information on how to contact you by electronic and paper mail.
 
-If the program is interactive, make it output a short notice like this
-when it starts in an interactive mode:
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
 
-    Gnomovision version 69, Copyright (C) year name of author
-    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
     This is free software, and you are welcome to redistribute it
     under certain conditions; type `show c' for details.
 
 The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, the commands you use may
-be called something other than `show w' and `show c'; they could even be
-mouse-clicks or menu items--whatever suits your program.
-
-You should also get your employer (if you work as a programmer) or your
-school, if any, to sign a "copyright disclaimer" for the program, if
-necessary.  Here is a sample; alter the names:
-
-  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
-  `Gnomovision' (which makes passes at compilers) written by James Hacker.
-
-  <signature of Ty Coon>, 1 April 1989
-  Ty Coon, President of Vice
-
-This General Public License does not permit incorporating your program into
-proprietary programs.  If your program is a subroutine library, you may
-consider it more useful to permit linking proprietary applications with the
-library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/Makefile.in b/Makefile.in
index b53b6f211..2baf32b97 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -11,7 +11,7 @@
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
+# the Free Software Foundation; either version 3 of the License, or
 # (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,
diff --git a/README_status_of_the_code_and_project_by_Vadim_02may2017.txt b/README_status_of_the_code_and_project_by_Vadim_02may2017.txt
deleted file mode 100644
index d139444a7..000000000
--- a/README_status_of_the_code_and_project_by_Vadim_02may2017.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-
-Actuellement, la version de l'inversion couplee avec FK fonctionne + parallelisme sur les sources. Il y a un petit exemple dans  DSM_FOR_SPECFEM3D/Examples/small_exemple_FWI_with_fk/fwi_fk.
-J'ai pas encore fini l'exemple avec le couplage AxiSEM, mais ca devrait marcher comme FK.
-
-Actuelement, je suis sur l'UNDO_ATTENUATION + GPU, je ferai l'exemple AxiSEM apres.
-
-Pour passer aux applis, il faut qu'on voie comment vous avez organise les donnees, sans doute il y aura des parametres d'entree supplementaires a prendre en compte que j'ai pas prevu. Il faut aussi tester la
-convolution des residus avec l'ondelette source, c'est code mais j'ai pas teste.
-
-Vadim.
-02 mai 2017
-
diff --git a/doc/USER_MANUAL/01_introduction.tex b/doc/USER_MANUAL/01_introduction.tex
index db63b5d68..2e40849bf 100644
--- a/doc/USER_MANUAL/01_introduction.tex
+++ b/doc/USER_MANUAL/01_introduction.tex
@@ -1,6 +1,10 @@
 \chapter{Introduction}
 
-\red{\Large ANNOUNCEMENT: SPECFEM3D can now perform gravity field calculations in addition (or instead of) seismic wave propagation only.
+\red{\Large ANNOUNCEMENT: SPECFEM3D can now perform full waveform inversion (FWI), i.e. invert for models in an iterative fashion, and it can also perform source inversions in a constant model;
+please refer to the two new directories, \texttt{inverse\_problem\_for\_model} and \texttt{inverse\_problem\_for\_source}, and the README files they contain. For FWI inversions for the model, also refer to the new examples provided in
+directory \texttt{EXAMPLES}.}\\
+
+\red{OTHER ANNOUNCEMENT: SPECFEM3D can now perform gravity field calculations in addition (or instead of) seismic wave propagation only.
 See flag \texttt{GRAVITY\_INTEGRALS} in file \texttt{setup/constants.h.in}. Please also refer to \url{http://komatitsch.free.fr/preprints/GJI_Martin_gravimetry_2017.pdf}.
 And yes, that is the reason why I added a falling apple on the cover of the manual :-)}\\
 
diff --git a/doc/USER_MANUAL/08_doing_tomography.tex b/doc/USER_MANUAL/08_doing_tomography.tex
index cb955f4ea..183334d52 100644
--- a/doc/USER_MANUAL/08_doing_tomography.tex
+++ b/doc/USER_MANUAL/08_doing_tomography.tex
@@ -1,5 +1,7 @@
 \chapter[Doing tomography based on the sensitivity kernels obtained]{Doing tomography, i.e., updating the model based on the sensitivity kernels obtained}\label{cha:tomo}
 
+\red{\Large ANNOUNCEMENT (June 2017): See also the next chapter (Chapter~\ref{cha:FWI}) about how to perform full waveform inversion (FWI) or source inversions.}\\
+
 UNDER CONSTRUCTION (July 2015). New content will be added soon.
 
 \section{Tomographic full waveform inversion (FWI) / imaging using the sensitivity kernels obtained}
diff --git a/doc/USER_MANUAL/D_license.tex b/doc/USER_MANUAL/D_license.tex
index 928ecd647..cba4a4fd0 100644
--- a/doc/USER_MANUAL/D_license.tex
+++ b/doc/USER_MANUAL/D_license.tex
@@ -1,349 +1,716 @@
-\chapter{License }\label{cha:License}
-
-\textbf{GNU GENERAL PUBLIC LICENSE Version 2, June 1991. Copyright
-(C) 1989, 1991 Free Software Foundation, Inc. 59 Temple Place, Suite
-330, Boston, MA 02111-1307 USA} \\
- Everyone is permitted to copy and distribute verbatim copies of this
-license document, but changing it is not allowed.
-
-
-\section*{Preamble}
-
-The licenses for most software are designed to take away your freedom
-to share and change it. By contrast, the GNU General Public License
-is intended to guarantee your freedom to share and change free software
--- to make sure the software is free for all its users. This General
-Public License applies to most of the Free Software Foundation's software
-and to any other program whose authors commit to using it. (Some other
-Free Software Foundation software is covered by the GNU Library General
-Public License instead.) You can apply it to your programs, too.
-
-When we speak of free software, we are referring to freedom, not price.
-Our General Public Licenses are designed to make sure that you have
-the freedom to distribute copies of free software (and charge for
-this service if you wish), that you receive source code or can get
-it if you want it, that you can change the software or use pieces
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-
-To protect your rights, we need to make restrictions that forbid anyone
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-
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-
-We protect your rights with two steps:
-\begin{enumerate}
-\item Copyright the software, and
-\item Offer you this license which gives you legal permission to copy, distribute
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-\end{enumerate}
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-
-Finally, any free program is threatened constantly by software patents.
-We wish to avoid the danger that redistributors of a free program
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-must be licensed for everyone's free use or not licensed at all.
-
-The precise terms and conditions for copying, distribution and modification
-follow.
-
-
-\section*{GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION
-AND MODIFICATION }
-\begin{itemize}
-\item 0.This License applies to any program or other work which contains
-a notice placed by the copyright holder saying it may be distributed
-under the terms of this General Public License. The ``Program''
-below refers to any such program or work, and a ``work based on the
-Program'' means either the Program or any derivative work under copyright
-law: that is to say, a work containing the Program or a portion of
-it, either verbatim or with modifications and/or translated into another
-language. (Hereinafter, translation is included without limitation
-in the term ``modification.'') Each licensee is addressed as ``you.''\\
- \\
- Activities other than copying, distribution and modification are
-not covered by this License; they are outside its scope. The act of
-running the Program is not restricted, and the output from the Program
-is covered only if its contents constitute a work based on the Program
-(independent of having been made by running the Program). Whether
-that is true depends on what the Program does.\end{itemize}
-\begin{enumerate}
-\item You may copy and distribute verbatim copies of the Program's source
-code as you receive it, in any medium, provided that you conspicuously
-and appropriately publish on each copy an appropriate copyright notice
-and disclaimer of warranty; keep intact all the notices that refer
-to this License and to the absence of any warranty; and give any other
-recipients of the Program a copy of this License along with the Program.
+\chapter{License}\label{cha:License}
 
+\begin{center}
 
-You may charge a fee for the physical act of transferring a copy,
-and you may at your option offer warranty protection in exchange for
-a fee.
+\textbf{GNU GENERAL PUBLIC LICENSE}
 
-\item You may modify your copy or copies of the Program or any portion of
-it, thus forming a work based on the Program, and copy and distribute
-such modifications or work under the terms of Section 1 above, provided
-that you also meet all of these conditions:
+\textbf{Version 3, 29 June 2007}
 
-\begin{enumerate}
-\item You must cause the modified files to carry prominent notices stating
-that you changed the files and the date of any change.
-\item You must cause any work that you distribute or publish, that in whole
-or in part contains or is derived from the Program or any part thereof,
-to be licensed as a whole at no charge to all third parties under
-the terms of this License.
-\item If the modified program normally reads commands interactively when
-run, you must cause it, when started running for such interactive
-use in the most ordinary way, to print or display an announcement
-including an appropriate copyright notice and a notice that there
-is no warranty (or else, saying that you provide a warranty) and that
-users may redistribute the program under these conditions, and telling
-the user how to view a copy of this License. (Exception: if the Program
-itself is interactive but does not normally print such an announcement,
-your work based on the Program is not required to print an announcement.)
-\end{enumerate}
+{\parindent 0in
 
-These requirements apply to the modified work as a whole. If identifiable
-sections of that work are not derived from the Program, and can be
-reasonably considered independent and separate works in themselves,
-then this License, and its terms, do not apply to those sections when
-you distribute them as separate works. But when you distribute the
-same sections as part of a whole which is a work based on the Program,
-the distribution of the whole must be on the terms of this License,
-whose permissions for other licensees extend to the entire whole,
-and thus to each and every part regardless of who wrote it.
+Copyright \copyright\  2007 Free Software Foundation, Inc. \texttt{http://fsf.org/}
 
+\bigskip
+Everyone is permitted to copy and distribute verbatim copies of this
 
-Thus, it is not the intent of this section to claim rights or contest
-your rights to work written entirely by you; rather, the intent is
-to exercise the right to control the distribution of derivative or
-collective works based on the Program.
+license document, but changing it is not allowed.}
 
+\end{center}
 
-In addition, mere aggregation of another work not based on the Program
-with the Program (or with a work based on the Program) on a volume
-of a storage or distribution medium does not bring the other work
-under the scope of this License.
+\subsection*{Preamble}
+The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
 
-\item You may copy and distribute the Program (or a work based on it, under
-Section 2) in object code or executable form under the terms of Sections
-1 and 2 above provided that you also do one of the following:
+The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
 
-\begin{enumerate}
-\item Accompany it with the complete corresponding machine-readable source
-code, which must be distributed under the terms of Sections 1 and
-2 above on a medium customarily used for software interchange; or,
-\item Accompany it with a written offer, valid for at least three years,
-to give any third party, for a charge no more than your cost of physically
-performing source distribution, a complete machine-readable copy of
-the corresponding source code, to be distributed under the terms of
-Sections 1 and 2 above on a medium customarily used for software interchange;
-or,
-\item Accompany it with the information you received as to the offer to
-distribute corresponding source code. (This alternative is allowed
-only for noncommercial distribution and only if you received the program
-in object code or executable form with such an offer, in accord with
-Subsection b above.)
-\end{enumerate}
+When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable.  Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+The precise terms and conditions for copying, distribution and
+modification follow.
+
+\begin{center}
+{\Large \sc Terms and Conditions}
+\end{center}
 
-The source code for a work means the preferred form of the work for
-making modifications to it. For an executable work, complete source
-code means all the source code for all modules it contains, plus any
-associated interface definition files, plus the scripts used to control
-compilation and installation of the executable. However, as a special
-exception, the source code distributed need not include anything that
-is normally distributed (in either source or binary form) with the
-major components (compiler, kernel, and so on) of the operating system
-on which the executable runs, unless that component itself accompanies
-the executable.
-
-
-If distribution of executable or object code is made by offering access
-to copy from a designated place, then offering equivalent access to
-copy the source code from the same place counts as distribution of
-the source code, even though third parties are not compelled to copy
-the source along with the object code.
-
-\item You may not copy, modify, sublicense, or distribute the Program except
-as expressly provided under this License. Any attempt otherwise to
-copy, modify, sublicense or distribute the Program is void, and will
-automatically terminate your rights under this License. However, parties
-who have received copies, or rights, from you under this License will
-not have their licenses terminated so long as such parties remain
-in full compliance.
-\item You are not required to accept this License, since you have not signed
-it. However, nothing else grants you permission to modify or distribute
-the Program or its derivative works. These actions are prohibited
-by law if you do not accept this License. Therefore, by modifying
-or distributing the Program (or any work based on the Program), you
-indicate your acceptance of this License to do so, and all its terms
-and conditions for copying, distributing or modifying the Program
-or works based on it.
-\item Each time you redistribute the Program (or any work based on the Program),
-the recipient automatically receives a license from the original licensor
-to copy, distribute or modify the Program subject to these terms and
-conditions. You may not impose any further restrictions on the recipients'
-exercise of the rights granted herein. You are not responsible for
-enforcing compliance by third parties to this License.
-\item If, as a consequence of a court judgment or allegation of patent infringement
-or for any other reason (not limited to patent issues), conditions
-are imposed on you (whether by court order, agreement or otherwise)
-that contradict the conditions of this License, they do not excuse
-you from the conditions of this License. If you cannot distribute
-so as to satisfy simultaneously your obligations under this License
-and any other pertinent obligations, then as a consequence you may
-not distribute the Program at all. For example, if a patent license
-would not permit royalty-free redistribution of the Program by all
-those who receive copies directly or indirectly through you, then
-the only way you could satisfy both it and this License would be to
-refrain entirely from distribution of the Program.
-
-
-If any portion of this section is held invalid or unenforceable under
-any particular circumstance, the balance of the section is intended
-to apply and the section as a whole is intended to apply in other
-circumstances.
-
-
-It is not the purpose of this section to induce you to infringe any
-patents or other property right claims or to contest validity of any
-such claims; this section has the sole purpose of protecting the integrity
-of the free software distribution system, which is implemented by
-public license practices. Many people have made generous contributions
-to the wide range of software distributed through that system in reliance
-on consistent application of that system; it is up to the author/donor
-to decide if he or she is willing to distribute software through any
-other system and a licensee cannot impose that choice.
-
-
-This section is intended to make thoroughly clear what is believed
-to be a consequence of the rest of this License.
-
-\item If the distribution and/or use of the Program is restricted in certain
-countries either by patents or by copyrighted interfaces, the original
-copyright holder who places the Program under this License may add
-an explicit geographical distribution limitation excluding those countries,
-so that distribution is permitted only in or among countries not thus
-excluded. In such case, this License incorporates the limitation as
-if written in the body of this License.
-\item The Free Software Foundation may publish revised and/or new versions
-of the General Public License from time to time. Such new versions
-will be similar in spirit to the present version, but may differ in
-detail to address new problems or concerns.
-
-
-Each version is given a distinguishing version number. If the Program
-specifies a version number of this License which applies to it and
-``any later version,'' you have the option of following the terms
-and conditions either of that version or of any later version published
-by the Free Software Foundation. If the Program does not specify a
-version number of this License, you may choose any version ever published
-by the Free Software Foundation.
 
-\item If you wish to incorporate parts of the Program into other free programs
-whose distribution conditions are different, write to the author to
-ask for permission. For software which is copyrighted by the Free
-Software Foundation, write to the Free Software Foundation; we sometimes
-make exceptions for this. Our decision will be guided by the two goals
-of preserving the free status of all derivatives of our free software
-and of promoting the sharing and reuse of software generally.
+\begin{enumerate}
+
+\addtocounter{enumi}{-1}
+
+\item Definitions.
+
+``This License'' refers to version 3 of the GNU General Public License.
+
+``Copyright'' also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+``The Program'' refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as ``you''.  ``Licensees'' and
+``recipients'' may be individuals or organizations.
+
+To ``modify'' a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy.  The resulting work is called a ``modified version'' of the
+earlier work or a work ``based on'' the earlier work.
+
+A ``covered work'' means either the unmodified Program or a work based
+on the Program.
+
+To ``propagate'' a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy.  Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+To ``convey'' a work means any kind of propagation that enables other
+parties to make or receive copies.  Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+An interactive user interface displays ``Appropriate Legal Notices''
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License.  If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+\item Source Code.
+
+The ``source code'' for a work means the preferred form of the work
+for making modifications to it.  ``Object code'' means any non-source
+form of a work.
+
+A ``Standard Interface'' means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+The ``System Libraries'' of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form.  A
+``Major Component'', in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+The ``Corresponding Source'' for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities.  However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
+which are not part of the work.  For example, Corresponding Source
+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+The Corresponding Source need not include anything that users
+can regenerate automatically from other parts of the Corresponding
+Source.
+
+The Corresponding Source for a work in source code form is that
+same work.
+
+\item Basic Permissions.
+
+All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met.  This License explicitly affirms your unlimited
+permission to run the unmodified Program.  The output from running a
+covered work is covered by this License only if the output, given its
+content, constitutes a covered work.  This License acknowledges your
+rights of fair use or other equivalent, as provided by copyright law.
+
+You may make, run and propagate covered works that you do not
+convey, without conditions so long as your license otherwise remains
+in force.  You may convey covered works to others for the sole purpose
+of having them make modifications exclusively for you, or provide you
+with facilities for running those works, provided that you comply with
+the terms of this License in conveying all material for which you do
+not control copyright.  Those thus making or running the covered works
+for you must do so exclusively on your behalf, under your direction
+and control, on terms that prohibit them from making any copies of
+your copyrighted material outside their relationship with you.
+
+Conveying under any other circumstances is permitted solely under
+the conditions stated below.  Sublicensing is not allowed; section 10
+makes it unnecessary.
+
+\item Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such circumvention
+is effected by exercising rights under this License with respect to
+the covered work, and you disclaim any intention to limit operation or
+modification of the work as a means of enforcing, against the work's
+users, your or third parties' legal rights to forbid circumvention of
+technological measures.
+
+\item Conveying Verbatim Copies.
+
+You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+\item Conveying Modified Source Versions.
+
+You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these conditions:
+  \begin{enumerate}
+  \item The work must carry prominent notices stating that you modified
+  it, and giving a relevant date.
+
+  \item The work must carry prominent notices stating that it is
+  released under this License and any conditions added under section
+  7.  This requirement modifies the requirement in section 4 to
+  ``keep intact all notices''.
+
+  \item You must license the entire work, as a whole, under this
+  License to anyone who comes into possession of a copy.  This
+  License will therefore apply, along with any applicable section 7
+  additional terms, to the whole of the work, and all its parts,
+  regardless of how they are packaged.  This License gives no
+  permission to license the work in any other way, but it does not
+  invalidate such permission if you have separately received it.
+
+  \item If the work has interactive user interfaces, each must display
+  Appropriate Legal Notices; however, if the Program has interactive
+  interfaces that do not display Appropriate Legal Notices, your
+  work need not make them do so.
 \end{enumerate}
+A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
+and which are not combined with it such as to form a larger program,
+in or on a volume of a storage or distribution medium, is called an
+``aggregate'' if the compilation and its resulting copyright are not
+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit.  Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
+parts of the aggregate.
+
+\item Conveying Non-Source Forms.
+
+You may convey a covered work in object code form under the terms
+of sections 4 and 5, provided that you also convey the
+machine-readable Corresponding Source under the terms of this License,
+in one of these ways:
+  \begin{enumerate}
+  \item Convey the object code in, or embodied in, a physical product
+  (including a physical distribution medium), accompanied by the
+  Corresponding Source fixed on a durable physical medium
+  customarily used for software interchange.
+
+  \item Convey the object code in, or embodied in, a physical product
+  (including a physical distribution medium), accompanied by a
+  written offer, valid for at least three years and valid for as
+  long as you offer spare parts or customer support for that product
+  model, to give anyone who possesses the object code either (1) a
+  copy of the Corresponding Source for all the software in the
+  product that is covered by this License, on a durable physical
+  medium customarily used for software interchange, for a price no
+  more than your reasonable cost of physically performing this
+  conveying of source, or (2) access to copy the
+  Corresponding Source from a network server at no charge.
+
+  \item Convey individual copies of the object code with a copy of the
+  written offer to provide the Corresponding Source.  This
+  alternative is allowed only occasionally and noncommercially, and
+  only if you received the object code with such an offer, in accord
+  with subsection 6b.
+
+  \item Convey the object code by offering access from a designated
+  place (gratis or for a charge), and offer equivalent access to the
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+  Corresponding Source along with the object code.  If the place to
+  copy the object code is a network server, the Corresponding Source
+  may be on a different server (operated by you or a third party)
+  that supports equivalent copying facilities, provided you maintain
+  clear directions next to the object code saying where to find the
+  Corresponding Source.  Regardless of what server hosts the
+  Corresponding Source, you remain obligated to ensure that it is
+  available for as long as needed to satisfy these requirements.
+
+  \item Convey the object code using peer-to-peer transmission, provided
+  you inform other peers where the object code and Corresponding
+  Source of the work are being offered to the general public at no
+  charge under subsection 6d.
+  \end{enumerate}
+
+A separable portion of the object code, whose source code is excluded
+from the Corresponding Source as a System Library, need not be
+included in conveying the object code work.
+
+A ``User Product'' is either (1) a ``consumer product'', which means any
+tangible personal property which is normally used for personal, family,
+or household purposes, or (2) anything designed or sold for incorporation
+into a dwelling.  In determining whether a product is a consumer product,
+doubtful cases shall be resolved in favor of coverage.  For a particular
+product received by a particular user, ``normally used'' refers to a
+typical or common use of that class of product, regardless of the status
+of the particular user or of the way in which the particular user
+actually uses, or expects or is expected to use, the product.  A product
+is a consumer product regardless of whether the product has substantial
+commercial, industrial or non-consumer uses, unless such uses represent
+the only significant mode of use of the product.
+
+``Installation Information'' for a User Product means any methods,
+procedures, authorization keys, or other information required to install
+and execute modified versions of a covered work in that User Product from
+a modified version of its Corresponding Source.  The information must
+suffice to ensure that the continued functioning of the modified object
+code is in no case prevented or interfered with solely because
+modification has been made.
+
+If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
+part of a transaction in which the right of possession and use of the
+User Product is transferred to the recipient in perpetuity or for a
+fixed term (regardless of how the transaction is characterized), the
+Corresponding Source conveyed under this section must be accompanied
+by the Installation Information.  But this requirement does not apply
+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or updates
+for a work that has been modified or installed by the recipient, or for
+the User Product in which it has been modified or installed.  Access to a
+network may be denied when the modification itself materially and
+adversely affects the operation of the network or violates the rules and
+protocols for communication across the network.
+
+Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+\item Additional Terms.
+
+``Additional permissions'' are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law.  If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it.  (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.)  You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders of
+that material) supplement the terms of this License with terms:
+  \begin{enumerate}
+  \item Disclaiming warranty or limiting liability differently from the
+  terms of sections 15 and 16 of this License; or
+
+  \item Requiring preservation of specified reasonable legal notices or
+  author attributions in that material or in the Appropriate Legal
+  Notices displayed by works containing it; or
+
+  \item Prohibiting misrepresentation of the origin of that material, or
+  requiring that modified versions of such material be marked in
+  reasonable ways as different from the original version; or
+
+  \item Limiting the use for publicity purposes of names of licensors or
+  authors of the material; or
+
+  \item Declining to grant rights under trademark law for use of some
+  trade names, trademarks, or service marks; or
+
+  \item Requiring indemnification of licensors and authors of that
+  material by anyone who conveys the material (or modified versions of
+  it) with contractual assumptions of liability to the recipient, for
+  any liability that these contractual assumptions directly impose on
+  those licensors and authors.
+  \end{enumerate}
+
+All other non-permissive additional terms are considered ``further
+restrictions'' within the meaning of section 10.  If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term.  If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
+additional terms that apply to those files, or a notice indicating
+where to find the applicable terms.
+
+Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions;
+the above requirements apply either way.
+
+\item Termination.
+
+You may not propagate or modify a covered work except as expressly
+provided under this License.  Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+However, if you cease all violation of this License, then your
+license from a particular copyright holder is reinstated (a)
+provisionally, unless and until the copyright holder explicitly and
+finally terminates your license, and (b) permanently, if the copyright
+holder fails to notify you of the violation by some reasonable means
+prior to 60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+\item Acceptance Not Required for Having Copies.
+
+You are not required to accept this License in order to receive or
+run a copy of the Program.  Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance.  However,
+nothing other than this License grants you permission to propagate or
+modify any covered work.  These actions infringe copyright if you do
+not accept this License.  Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+\item Automatic Licensing of Downstream Recipients.
+
+Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License.  You are not responsible
+for enforcing compliance by third parties with this License.
+
+An ``entity transaction'' is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations.  If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License.  For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+\item Patents.
+
+A ``contributor'' is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based.  The
+work thus licensed is called the contributor's ``contributor version''.
+
+A contributor's ``essential patent claims'' are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version.  For
+purposes of this definition, ``control'' includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+In the following three paragraphs, a ``patent license'' is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To ``grant'' such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  ``Knowingly relying'' means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+A patent license is ``discriminatory'' if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+\item No Surrender of Others' Freedom.
+
+If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+\item Use with the GNU Affero General Public License.
+
+Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+\item Revised Versions of this License.
+
+The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License ``or any later version'' applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
 
-\subsection*{NO WARRANTY }
-\begin{itemize}
-\item 11.BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
-FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT
-WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER
-PARTIES PROVIDE THE PROGRAM ``AS IS'' WITHOUT WARRANTY OF ANY KIND,
-EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
-THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS
-WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST
-OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
-\item 12.IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
-REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR
-DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL
-DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING
-BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE
-OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
-TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
-PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
-\end{itemize}
-
-\section*{END OF TERMS AND CONDITIONS }
-
-
-\subsection*{How to Apply These Terms to Your New Programs}
+If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+\item Disclaimer of Warranty.
+
+\begin{sloppypar}
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+ APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE
+ COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM ``AS IS''
+ WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED,
+ INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE
+ RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.
+ SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
+ NECESSARY SERVICING, REPAIR OR CORRECTION.
+\end{sloppypar}
+
+\item Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
+ WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES
+ AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR
+ DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL
+ DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM
+ (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
+ INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE
+ OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH
+ HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ DAMAGES.
+
+\item Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+\begin{center}
+{\Large\sc End of Terms and Conditions}
+
+\bigskip
+How to Apply These Terms to Your New Programs
+\end{center}
 
 If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make
-it free software which everyone can redistribute and change under
-these terms.
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
 
-To do so, attach the following notices to the program. It is safest
+To do so, attach the following notices to the program.  It is safest
 to attach them to the start of each source file to most effectively
-convey the exclusion of warranty; and each file should have at least
-the ``copyright'' line and a pointer to where the full notice is
-found. For example:
-\begin{quote}
-One line to give the program's name and a brief idea of what it does.
-Copyright {\footnotesize $\copyright$ (}year) (name of author)
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published
-by the Free Software Foundation; either version 2 of the License,
-or (at your option) any later version.
-
-This program is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-for more details.
+state the exclusion of warranty; and each file should have at least
+the ``copyright'' line and a pointer to where the full notice is found.
+
+{\footnotesize
+\begin{verbatim}
+<one line to give the program's name and a brief idea of what it does.>
+
+Copyright (C) <textyear>  <name of author>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software Foundation,
-Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-\end{quote}
-Also add information on how to contact you by electronic and paper
-mail.
-
-If the program is interactive, make it output a short notice like
-this when it starts in an interactive mode:
-\begin{quote}
-Gnomovision version 69, Copyright $\copyright$ year name of author
-Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show
-w'. This is free software, and you are welcome to redistribute it
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+\end{verbatim}
+}
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+{\footnotesize
+\begin{verbatim}
+<program>  Copyright (C) <year>  <name of author>
+
+This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+This is free software, and you are welcome to redistribute it
 under certain conditions; type `show c' for details.
-\end{quote}
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License. Of course, the commands you use
-may be called something other than `show w' and `show c'; they could
-even be mouse-clicks or menu items -- whatever suits your program.
+\end{verbatim}
+}
+
+The hypothetical commands {\tt show w} and {\tt show c} should show
+the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an ``about box''.
 
 You should also get your employer (if you work as a programmer) or
-your school, if any, to sign a ``copyright disclaimer'' for the
-program, if necessary. Here is a sample; alter the names:
-\begin{quote}
-Yoyodyne, Inc., hereby disclaims all copyright interest in the program
-`Gnomovision' (which makes passes at compilers) written by James Hacker.
-
-(signature of Ty Coon)\\
- 1 April 1989 \\
- Ty Coon, President of Vice
-\end{quote}
-This General Public License does not permit incorporating your program
-into proprietary programs. If your program is a subroutine library,
-you may consider it more useful to permit linking proprietary applications
-with the library. If this is what you want to do, use the GNU Library
-General Public License instead of this License.
+school, if any, to sign a ``copyright disclaimer'' for the program, if
+necessary.  For more information on this, and how to apply and follow
+the GNU GPL, see \texttt{http://www.gnu.org/licenses/}.
+
+The GNU General Public License does not permit incorporating your
+program into proprietary programs.  If your program is a subroutine
+library, you may consider it more useful to permit linking proprietary
+applications with the library.  If this is what you want to do, use
+the GNU Lesser General Public License instead of this License.  But
+first, please read \texttt{http://www.gnu.org/philosophy/why-not-lgpl.html}.
+
+\end{enumerate}
 
+\end{document}
diff --git a/doc/USER_MANUAL/bibliography.bib b/doc/USER_MANUAL/bibliography.bib
index 8f556192f..09fcfc82e 100644
--- a/doc/USER_MANUAL/bibliography.bib
+++ b/doc/USER_MANUAL/bibliography.bib
@@ -13,6 +13,7 @@ @String { gji
 @String { gjras      = {Geophys. J. Roy. Astron. Soc.} }
 @String { gp         = {Geophys. Prospect.} }
 @String { grl        = {Geophys. Res. Lett.} }
+@String { ieeetuffc  = {IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control} }
 @String { ijnme      = {Int. J. Numer. Methods Eng.} }
 @String { jap        = {J. Appl. Phys.} }
 @String { jasa       = {J. Acoust. Soc. Am.} }
@@ -65,6 +66,18 @@ @Article{EtChViGl10
   Doi                      = {10.1111/j.1365-246X.2010.04764.x}
 }
 
+@Article{OzMc96,
+  Title                    = {Causes and reduction of numerical artefacts in pseudo-spectral wavefield extrapolation},
+  Author                   = {\"Ozdenvar, Turgut and McMechan, George A.},
+  Journal                  = gji,
+  Year                     = {1996},
+  Number                   = {3},
+  Pages                    = {819-828},
+  Volume                   = {126},
+
+  Doi                      = {10.1111/j.1365-246X.1996.tb04705.x}
+}
+
 @Article{Vciegis06,
   Title                    = {Parallel numerical algorithms for 3D parabolic problem with nonlocal boundary condition},
   Author                   = {{\v{C}}iegis, Raimondas},
@@ -97,6 +110,18 @@ @Article{AaHeHa2001
   Volume                   = {91}
 }
 
+@InProceedings{Aanes2012,
+  Title                    = {Ultrasonic beam transmission through a water-immersed plate at oblique incidence using a piezoelectric source transducer: {F}inite element angular spectrum modeling and measurements},
+  Author                   = {M. Aanes and K. D. Lohne and P. Lunde and M. Vestrheim},
+  Booktitle                = {Proceedings of the 2012 IEEE International Ultrasonics Symposium},
+  Year                     = {2012},
+
+  Address                  = {Dresden, Germany},
+  Pages                    = {1972-1977},
+
+  Doi                      = {10.1109/ULTSYM.2012.0494}
+}
+
 @Article{AbGo98,
   Title                    = {On the construction of absorbing layers in {CEM}},
   Author                   = {S. Abarbanel and D. Gottlieb},
@@ -234,6 +259,18 @@ @Article{AgDeDoHaKuLaLtLuTo09
   Doi                      = {10.1088/1742-6596/180/1/012037}
 }
 
+@Article{Ahmad2013,
+  Title                    = {Semi-analytical finite element method for modeling of {L}amb wave propagation},
+  Author                   = {Ahmad, Z. A. B. and Vivar-Perez, J. M. and Gabbert, U.},
+  Journal                  = {CEAS Aeronautical Journal},
+  Year                     = {2013},
+  Number                   = {1},
+  Pages                    = {21-33},
+  Volume                   = {4},
+
+  Doi                      = {10.1007/s13272-012-0056-6}
+}
+
 @Article{AiMoMu06,
   Title                    = {Dispersive and Dissipative Properties of Discontinuous {G}alerkin Finite Element Methods for the Second-Order Wave Equation},
   Author                   = {Ainsworth, M. and Monk, P. and Muniz, W.},
@@ -357,6 +394,40 @@ @Article{AlKeBo74
   Volume                   = {39}
 }
 
+@Article{Alleyne92,
+  Title                    = {The interaction of {L}amb waves with defects},
+  Author                   = {D. N. Alleyne and P. Cawley},
+  Journal                  = ieeetuffc,
+  Year                     = {1992},
+  Number                   = {3},
+  Pages                    = {381-397},
+  Volume                   = {39},
+
+  Doi                      = {10.1109/58.143172}
+}
+
+@Article{AlleyneCawley1992,
+  Title                    = {Optimization of {L}amb wave inspection techniques},
+  Author                   = {Alleyne, David N and Cawley, Peter},
+  Journal                  = {NDT \& E International},
+  Year                     = {1992},
+  Number                   = {1},
+  Pages                    = {11-22},
+  Volume                   = {25}
+}
+
+@Article{Alleyne91,
+  Title                    = {A two-dimensional {F}ourier transform method for the measurement of propagating multimode signals},
+  Author                   = {D. N. Alleyne and P. Cawley},
+  Journal                  = jasa,
+  Year                     = {1991},
+  Number                   = {3},
+  Pages                    = {1159-1168},
+  Volume                   = {89},
+
+  Doi                      = {10.1121/1.400530}
+}
+
 @Article{AlGr02,
   Title                    = {Nonreflecting boundary conditions for the time-dependent wave equation},
   Author                   = {Alpert, B. and Greengard, L. and Hagstrom, T.},
@@ -731,6 +802,18 @@ @TechReport{ra
   Number                   = {1986/2}
 }
 
+@Article{ArPiGaPeFiTa13,
+  Title                    = {Global approach for transient shear wave inversion based on the adjoint method: a comprehensive {2D} simulation study},
+  Author                   = {B. Arnal and Gianmarco F. Pinton and P. Garapon and M. Pernot and M. Fink and M. Tanter},
+  Journal                  = {Physics in Medicine and Biology},
+  Year                     = {2013},
+  Number                   = {19},
+  Pages                    = {6765},
+  Volume                   = {58},
+
+  Doi                      = {10.1088/0031-9155/58/19/6765}
+}
+
 @Article{Arn82,
   Title                    = {An Interior Penalty Finite Element Method with Discontinuous Elements},
   Author                   = {Douglas N. Arnold},
@@ -753,6 +836,18 @@ @Article{ArHa79
   Volume                   = {17}
 }
 
+@Article{AsCoVaRi84,
+  Title                    = {A continuous wave technique for the measurement of the elastic properties of cortical bone},
+  Author                   = {Ashman, R. B. and Cowin, S. C. and van Buskirk, W. C. and Rice, J. C.},
+  Journal                  = {Journal of Biomechanics},
+  Year                     = {1984},
+  Number                   = {5},
+  Pages                    = {349-361},
+  Volume                   = {17},
+
+  Doi                      = {10.1016/0021-9290(84)90029-0}
+}
+
 @Article{AsAkBiGh07,
   Title                    = {Full Waveform Inversion for Seismic Velocity and Anelastic Losses in Heterogeneous Structures},
   Author                   = {Askan, Aysegul and Ak{\c c}elik, Volkan and Bielak, Jacobo and Ghattas, Omar},
@@ -1096,6 +1191,13 @@ @Article{BaSzKa81
   Volume                   = {18}
 }
 
+@PhdThesis{Bac16,
+  Title                    = {Imagerie ultrasonore {2D} et {3D} sur {GPU} : application au temps r\'eel et \`a l'inversion de forme d'onde compl\`ete},
+  Author                   = {\'Etienne Bachmann},
+  School                   = {University of Toulouse, France},
+  Year                     = {2016}
+}
+
 @Article{Bac76,
   Title                    = {Error estimates for the finite element method for second order hyperbolic equations},
   Author                   = {G. A. Backer},
@@ -1211,7 +1313,7 @@ @Article{BaChLa77
 }
 
 @Article{BaEnHaJo88,
-  Title                    = {Higher order paraxial wave equation approximations in heterogeneous media},
+  Title                    = {Higher-order paraxial wave equation approximations in heterogeneous media},
   Author                   = {A. Bamberger and B. Engquist and L. Halpern and P. Joly},
   Journal                  = {SIAM J. Appl. Math.},
   Year                     = {1988},
@@ -1220,7 +1322,7 @@ @Article{BaEnHaJo88
 }
 
 @Article{BaJoRo90,
-  Title                    = {Second order absorbing boundary conditions for the wave equation: a solution for the corner problem},
+  Title                    = {Second-order absorbing boundary conditions for the wave equation: a solution for the corner problem},
   Author                   = {A. Bamberger and P. Joly and J. E. Roberts},
   Journal                  = {SIAM Journal on Numerical Analysis},
   Year                     = {1990},
@@ -1380,6 +1482,17 @@ @InProceedings{BaSaFiRo05
   Doi                      = {10.1109/APS.2005.1552619}
 }
 
+@Article{Bar08,
+  Title                    = {Quantitative ultrasound methods to assess bone mineral status in children: {T}echnical characteristics, performance, and clinical application},
+  Author                   = {Giampiero I. Baroncelli},
+  Journal                  = {Pediatric Research},
+  Year                     = {2008},
+  Pages                    = {220-228},
+  Volume                   = {63},
+
+  Doi                      = {10.1203/PDR.0b013e318163a286}
+}
+
 @InProceedings{Ba03,
   Title                    = {A family of first-order conditions for the long-time stability of the {M}axwell system},
   Author                   = {H. Barucq},
@@ -1749,6 +1862,33 @@ @Article{BeLaPi06
   Volume                   = {14}
 }
 
+@Article{Bernard2013,
+  Title                    = {Accurate measurement of cortical bone elasticity tensor with resonant ultrasound spectroscopy},
+  Author                   = {Bernard, Simon and Grimal, Quentin and Laugier, Pascal},
+  Journal                  = {Journal of the Mechanical Behavior of Biomedical Materials},
+  Year                     = {2013},
+  Pages                    = {12-19},
+  Volume                   = {18}
+}
+
+@Article{BeMoKoLa17,
+  Title                    = {Ultrasonic computed tomography based on full-waveform inversion for bone quantitative imaging},
+  Author                   = {Simon Bernard and Vadim Monteiller and Dimitri Komatitsch and Philippe Lasaygues},
+  Journal                  = {Physics in Medicine and Biology},
+  Year                     = {2017},
+  Note                     = {in press.}
+}
+
+@Article{Bernard2016,
+  Title                    = {Elasticity-density and viscoelasticity-density relationships at the tibia mid-diaphysis assessed from resonant ultrasound spectroscopy measurements},
+  Author                   = {Bernard, Simon and Schneider, Joannes and Varga, Peter and Laugier, Pascal and Raum, Kay and Grimal, Quentin},
+  Journal                  = {Biomechanics and Modeling in Mechanobiology},
+  Year                     = {2016},
+  Number                   = {1},
+  Pages                    = {97-109},
+  Volume                   = {15}
+}
+
 @Book{BeDaMaAz99,
   Title                    = {Spectral methods for axisymmetric domains},
   Author                   = {Bernardi, C. and Dauge, M. and Maday, Y. and Aza{\"\i}ez, M.},
@@ -1963,6 +2103,18 @@ @Article{BlLoKoBa09
   Doi                      = {10.1029/2008JE003229}
 }
 
+@Article{BoBa94,
+  Title                    = {A family of low dispersive and low dissipative explicit schemes for flow and noise computations},
+  Author                   = {Christophe Bogey and Christophe Bailly},
+  Journal                  = jcp,
+  Year                     = {2004},
+  Number                   = {1},
+  Pages                    = {194-214},
+  Volume                   = {194},
+
+  Doi                      = {10.1016/j.jcp.2003.09.003}
+}
+
 @Article{BoSaenger06,
   Title                    = {Accuracy of heterogeneous staggered-grid finite-difference modeling of {R}ayleigh waves},
   Author                   = {Thomas Bohlen and Erik H. Saenger},
@@ -2007,6 +2159,15 @@ @Article{BoVi91
   Volume                   = {81}
 }
 
+@Book{BoGiLeSa06,
+  Title                    = {Numerical optimization: theoretical and practical aspects},
+  Author                   = {Bonnans, J. Fr\'ed\'eric and Gilbert, Jean Charles and Lemar\'echal, Claude and Sagastiz\'abal, Claudia A.},
+  Publisher                = {Springer-Verlag},
+  Year                     = {2006},
+
+  Address                  = {Secaucus, New Jersey, USA}
+}
+
 @Book{Bon95,
   Title                    = {\'Equations int\'egrales et \'el\'ements de fronti\`ere},
   Author                   = {M. Bonnet},
@@ -2259,7 +2420,7 @@ @InProceedings{BoMaHe91
 
   Address                  = {Commack, NY, USA},
   Pages                    = {405-422},
-  Publisher                = {Nova Science Publishers, Inc.},
+  Publisher                = {Nova Science Publishers},
 
   Location                 = {Paris, France}
 }
@@ -2368,6 +2529,18 @@ @Article{BrMaGaKo16
   Doi                      = {10.1093/gji/ggw121}
 }
 
+@Article{BrVaRoVa17,
+  Title                    = {Immersive boundary conditions: {T}heory, implementation, and examples},
+  Author                   = {Filippo Broggini and Marlies Vasmel and Robertsson, Johan O. A. and van Manen, Dirk-Jan},
+  Journal                  = geophysics,
+  Year                     = {2017},
+  Number                   = {3},
+  Pages                    = {T97-T110},
+  Volume                   = {82},
+
+  Doi                      = {10.1190/geo2016-0458.1}
+}
+
 @Article{Brossier2013,
   Title                    = {Performances of 3{D} frequency-domain full-waveform inversion based on frequency-domain direct-solver and time-domain modeling: application to 3D {OBC} {D}ata from the {V}alhall {F}ield},
   Author                   = {R. Brossier and V. Etienne and G. Hu and S. Operto and J. Virieux},
@@ -2376,7 +2549,7 @@ @Article{Brossier2013
   Month                    = {March},
   Note                     = {Oral Communication},
 
-  Address                  = {Beijing China},
+  Address                  = {Beijing, China},
   Booktitle                = {IPTC 2013 : International Petroleum Technology Conference},
   Publisher                = {IPTC Press}
 }
@@ -2477,6 +2650,18 @@ @Article{Buckingham98
   Volume                   = {103}
 }
 
+@Article{BuSaZaCh95,
+  Title                    = {Multiscale seismic waveform inversion},
+  Author                   = {Bunks, Carey and Saleck, Fatimetou M. and Zaleski, S. and Chavent, G.},
+  Journal                  = geophysics,
+  Year                     = {1995},
+  Number                   = {5},
+  Pages                    = {1457-1473},
+  Volume                   = {60},
+
+  Doi                      = {10.1190/1.1443880}
+}
+
 @Article{Bur71,
   Title                    = {Lamb's problem for an anisotropic half-space},
   Author                   = {R. Burridge},
@@ -2586,6 +2771,15 @@ @Article{CaBo85
   Volume                   = {83}
 }
 
+@Article{CaFeBoBe93,
+  Title                    = {Attenuation of crustal waves across the {A}lpine range},
+  Author                   = {Campillo, M. and Feigner, B. and Bouchon, M. and Bethoux, N.},
+  Journal                  = jgr,
+  Year                     = {1993},
+  Pages                    = {1987-1996},
+  Volume                   = {98}
+}
+
 @InCollection{CaDo99,
   Title                    = {Curvelets: A Surprisingly Effective Nonadaptive Representation for Objects with Edges, Curves and Surfaces},
   Author                   = {E. J. Cand\`es and D. L. Donoho},
@@ -2965,6 +3159,13 @@ @Article{CasBer92
   Volume                   = {5}
 }
 
+@PhdThesis{Cas14,
+  Title                    = {Speed up and regularization techniques for seismic full waveform inversion},
+  Author                   = {Castellanos Lopez, Clara},
+  School                   = {University of Nice Sophia Antipolis, France},
+  Year                     = {2014}
+}
+
 @Article{CaSt08,
   Title                    = {Investigation of 3D acoustical effects using a multiprocessing parabolic equation based algorithm},
   Author                   = {Castor, Kaeling and Sturm, Fr{\'e}d{\'e}ric},
@@ -3155,6 +3356,18 @@ @Article{ChBoSe08
   Doi                      = {10.1016/j.cma.2008.04.024}
 }
 
+@Article{ChGo04,
+  Title                    = {A higher-order spectral element for wave propagation analysis in functionally graded materials},
+  Author                   = {Chakraborty, A. and Gopalakrishnan, S.},
+  Journal                  = {Acta Mechanica},
+  Year                     = {2004},
+  Number                   = {1},
+  Pages                    = {17-43},
+  Volume                   = {172},
+
+  Doi                      = {10.1007/s00707-004-0158-2}
+}
+
 @PhdThesis{Ch00,
   Title                    = {Mod\'elisation num\'erique de la propagation d'ondes sismiques en g\'eom\'etrie sph\'erique : application \`a la sismologie globale ({N}umerical modeling of the propagation of seismic waves in spherical geometry: {a}pplication to global seismology)},
   Author                   = {E. Chaljub},
@@ -3165,7 +3378,7 @@ @PhdThesis{Ch00
 }
 
 @Article{ChCaVi03,
-  Title                    = {Solving Elastodynamics in a Fluid-Solid Heterogeneous Sphere: a Parallel Spectral-Element Approximation on Non-Conforming Grids},
+  Title                    = {Solving elastodynamics in a fluid-solid heterogeneous sphere: a parallel spectral-element approximation on non-conforming grids},
   Author                   = {E. Chaljub and Y. Capdeville and J. P. Vilotte},
   Journal                  = jcp,
   Year                     = {2003},
@@ -3303,6 +3516,27 @@ @Article{ChDuLe75
   Volume                   = {15}
 }
 
+@Article{ChCaGiCa93,
+  Title                    = {Crustal wave propagation anomaly across the {P}yrenean {R}ange: {C}omparison between observations and numerical simulations},
+  Author                   = {Chazalon, A. and Campillo, M. and Gibson, R. and Carre\~{n}o, E.},
+  Journal                  = gji,
+  Year                     = {1993},
+  Pages                    = {829-838},
+  Volume                   = {115}
+}
+
+@Article{ChWaLi10,
+  Title                    = {The {C}hebyshev spectral element method using staggered predictor and corrector for elastic wave simulations},
+  Author                   = {Che, Cheng-Xuan and Wang, Xiu-Ming and Lin, Wei-Jun},
+  Journal                  = {Applied Geophysics},
+  Year                     = {2010},
+  Number                   = {2},
+  Pages                    = {174-184},
+  Volume                   = {7},
+
+  Doi                      = {10.1007/s11770-010-0242-9}
+}
+
 @Article{Che:2008:APS,
   Title                    = {A performance study of general-purpose applications on graphics processors using {CUDA}},
   Author                   = {Shuai Che and Michael Boyer and Jiayuan Meng and David Tarjan and Jeremy W. Sheaffer and Kevin Skadron},
@@ -3455,6 +3689,15 @@ @Article{ChMaKo12
   Doi                      = {10.1111/j.1365-246X.2012.05686.x}
 }
 
+@Article{ChSyDiRuPa15,
+  Title                    = {The {P}yrenean architecture as revealed by teleseismic {P}-to-{S} converted waves recorded along two dense transects},
+  Author                   = {Chevrot, S. and Sylvander, M. and Diaz, J. and Ruiz, M. and Paul, A. and {the PYROPE Working group}},
+  Journal                  = gji,
+  Year                     = {2015},
+  Pages                    = {1096-1107},
+  Volume                   = {200}
+}
+
 @Article{ChJiMi97,
   Title                    = {Complex coordinate stretching as a generalized absorbing boundary condition},
   Author                   = {Chew, W. C. and Jin, J. M. and Michielssen, E.},
@@ -3513,6 +3756,15 @@ @Article{Choukroune89
   Volume                   = {8}
 }
 
+@Article{Chr04,
+  Title                    = {Serpentinites, peridotites, and seismology},
+  Author                   = {Christensen, N. I.},
+  Journal                  = {International Geology Review},
+  Year                     = {2004},
+  Pages                    = {795-816},
+  Volume                   = {49}
+}
+
 @Article{ChTu00,
   Title                    = {Accuracy of Higher-Order Finite Difference Schemes on Nonuniform Grids},
   Author                   = {Yongmann M. Chung and Paul G. Tucker},
@@ -3826,7 +4078,7 @@ @Article{Col89
 
 @Article{ColKu92,
   Title                    = {Nonlinear inversion for ocean-bottom properties},
-  Author                   = {Collins, Michael D and Kuperman, WA and Schmidt, Henrik},
+  Author                   = {Collins, Michael D. and Kuperman, W. A. and Schmidt, Henrik},
   Journal                  = jasa,
   Year                     = {1992},
   Pages                    = {2770-2783},
@@ -3872,6 +4124,18 @@ @Manual{Comsol2015
   Year                     = {2015}
 }
 
+@Article{CoRoCaDu12,
+  Title                    = {Instantaneous phase variation for seismic velocity monitoring from ambient noise at the exploration scale},
+  Author                   = {Margherita Corciulo and Philippe Roux and Michel Campillo and Dominique Dubucq},
+  Journal                  = geophysics,
+  Year                     = {2012},
+  Number                   = {4},
+  Pages                    = {Q37-Q44},
+  Volume                   = {77},
+
+  Doi                      = {10.1190/geo2011-0363.1}
+}
+
 @Article{cormier1999,
   Title                    = {Anisotropy of heterogeneity scale lengths in the lower mantle from PKIKP precursors},
   Author                   = {V. F. Cormier},
@@ -4113,6 +4377,28 @@ @Article{Dab86
   Volume                   = {51}
 }
 
+@Article{DaPeDeMoBe99,
+  Title                    = {Efficiency of quantitative ultrasound measurements as compared with dual-energy {X}-ray absorptiometry in the assessment of corticosteroid-induced bone impairment},
+  Author                   = {Daens, S. and Peretz, A. and de Maertelaer, V. and Moris, M. and Bergmann, P.},
+  Journal                  = {Osteoporosis International},
+  Year                     = {1999},
+  Number                   = {4},
+  Pages                    = {278-283},
+  Volume                   = {10},
+
+  Doi                      = {10.1007/s001980050227}
+}
+
+@Article{DaYe06,
+  Title                    = {2-{D} array for 3-{D} ultrasound imaging using synthetic aperture techniques},
+  Author                   = {Daher, N. M. and Yen, J. T.},
+  Journal                  = ieeetuffc,
+  Year                     = {2006},
+  Number                   = {5},
+  Pages                    = {912-924},
+  Volume                   = {53}
+}
+
 @Article{DaBa02,
   Title                    = {Fr\'echet kernels for body-wave amplitudes},
   Author                   = {F. A. Dahlen and A. M. Baig},
@@ -4242,7 +4528,7 @@ @Article{DarAlsLotLyuShu98
 @Article{DarWei05,
   Title                    = {Acoustic waves in bounded anisotropic media: theorems, estimations, and computations},
   Author                   = {A. N. Darinskii and M. Weihnacht},
-  Journal                  = {IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control},
+  Journal                  = ieeetuffc,
   Year                     = {2005},
   Number                   = {5},
   Pages                    = {792-801},
@@ -4335,6 +4621,18 @@ @Article{DaMi84
   Doi                      = {10.1111/j.1365-246X.1984.tb06474.x}
 }
 
+@Article{DeSe15,
+  Title                    = {A comparison of finite-difference and spectral-element methods for elastic wave propagation in media with a fluid-solid interface},
+  Author                   = {De Basabe, Jon\'as D. and Sen, Mrinal K.},
+  Journal                  = gji,
+  Year                     = {2015},
+  Number                   = {1},
+  Pages                    = {278-298},
+  Volume                   = {200},
+
+  Doi                      = {10.1093/gji/ggu389}
+}
+
 @Article{DeSe10,
   Title                    = {Stability of the high-order finite elements for acoustic or elastic wave propagation with high-order time stepping},
   Author                   = {Jon{\'a}s D. {De Basabe} and Mrinal K. Sen},
@@ -4499,6 +4797,38 @@ @Article{Des01b
   Volume                   = {110}
 }
 
+@Article{devaney2005time,
+  Title                    = {Time reversal imaging of obscured targets from multistatic data},
+  Author                   = {Devaney, Anthony J.},
+  Journal                  = {IEEE Transactions on Antennas and Propagation},
+  Year                     = {2005},
+  Number                   = {5},
+  Pages                    = {1600-1610},
+  Volume                   = {53}
+}
+
+@Article{devaney1982filtered,
+  Title                    = {A filtered backpropagation algorithm for diffraction tomography},
+  Author                   = {Devaney, A. J. },
+  Journal                  = {Ultrasonic imaging},
+  Year                     = {1982},
+  Number                   = {4},
+  Pages                    = {336-350},
+  Volume                   = {4}
+}
+
+@Article{DeMaGr05,
+  Title                    = {Time-reversal-based imaging and inverse scattering of multiply-scattering point targets},
+  Author                   = {Anthony J. Devaney and Edwin A. Marengo and Fred K. Gruber},
+  Journal                  = jasa,
+  Year                     = {2005},
+  Number                   = {5},
+  Pages                    = {3129-3138},
+  Volume                   = {118},
+
+  Doi                      = {10.1121/1.2042987}
+}
+
 @Book{DeFiMu02,
   Title                    = {High-Order Methods for Incompressible Fluid Flow},
   Author                   = {M. O. Deville and P. F. Fischer and E. H. Mund},
@@ -4582,6 +4912,47 @@ @Article{DiJo05
   Volume                   = {13}
 }
 
+@PhdThesis{Diligent2003,
+  Title                    = {Interaction between fundamental {L}amb modes and defects in plates},
+  Author                   = {Olivier Diligent},
+  School                   = {Imperial College, University of London, United Kingdom},
+  Year                     = {2003}
+}
+
+@Article{Diligent2005reflection,
+  Title                    = {Reflection of the $s_0$ {L}amb mode from a flat bottom circular hole},
+  Author                   = {O. Diligent and M. J. S. Lowe},
+  Journal                  = jasa,
+  Year                     = {2005},
+  Number                   = {5},
+  Pages                    = {2869-2879},
+  Volume                   = {118},
+
+  Doi                      = {10.1121/1.2074947}
+}
+
+@Article{Ditri97,
+  Title                    = {An experimental study of the angular dependence of {L}amb wave excitation amplitudes},
+  Author                   = {J. J. Ditri and K. Rajana},
+  Journal                  = {Journal of Sound and Vibration},
+  Year                     = {1997},
+  Number                   = {5},
+  Pages                    = {755-768},
+  Volume                   = {204},
+
+  Doi                      = {10.1006/jsvi.1997.0976}
+}
+
+@InProceedings{Ditri92,
+  Title                    = {Mode selection criteria for defect detection optimization using {L}amb waves},
+  Author                   = {Ditri, J. J. and Rose, J. L. and Chen, G.},
+  Booktitle                = {Review of Progress in Quantitative Nondestructive Evaluation},
+  Year                     = {1992},
+  Editor                   = {Thompson, D. O. and Chimenti, D. E.},
+  Pages                    = {2109-2115},
+  Volume                   = {11B}
+}
+
 @Article{DmLi11,
   Title                    = {Application of {M-PML} Reflectionless Boundary Conditions to the Numerical Simulation of Wave Propagation in Anisotropic Media. {P}art {I}: {R}eflectivity},
   Author                   = {M. N. Dmitriev and V. V. Lisitsa},
@@ -4624,6 +4995,16 @@ @InProceedings{DoBiBo07
   Url                      = {www.irisa.fr/caps/projects/Astex}
 }
 
+@Article{DoTe08,
+  Title                    = {Conformal Perfectly Matched Layer for the Mixed Finite Element Time-Domain Method},
+  Author                   = {Donderici, Burkay and Teixeira, Fernando L.},
+  Journal                  = {IEEE Transactions on Antennas and Propagation},
+  Year                     = {2008},
+  Number                   = {4},
+  Pages                    = {1017-1026},
+  Volume                   = {56}
+}
+
 @Article{DoShGuMa05,
   Title                    = {An eigenvalue decomposition method to construct absorbing boundary conditions for acoustic and elastic wave equations},
   Author                   = {Liangguo Dong and Deping She and Luping Guan and Zaitian Ma},
@@ -4906,6 +5287,26 @@ @InProceedings{DuLaPr
   Note                     = {submitted.}
 }
 
+@Article{duric2005development,
+  Title                    = {Development of ultrasound tomography for breast imaging: {T}echnical assessment},
+  Author                   = {Duric, Nebojsa and Littrup, Peter and Babkin, Alex and Chambers, David and Azevedo, Stephen and Kalinin, Arkady and Pevzner, Roman and Tokarev, Mikhail and Holsapple, Earle and Rama, Olsi and others},
+  Journal                  = {Medical Physics},
+  Year                     = {2005},
+  Number                   = {5},
+  Pages                    = {1375-1386},
+  Volume                   = {32}
+}
+
+@Article{Duric2007,
+  Title                    = {Detection of breast cancer with ultrasound tomography: {F}irst results with the {C}omputed {U}ltrasound {R}isk {E}valuation ({CURE}) prototype},
+  Author                   = {Duric, Nebojsa and Littrup, Peter and Poulo, Lou and Babkin, Alex and Pevzner, Roman and Holsapple, Earle and Rama, Olsi and Glide, Carri},
+  Journal                  = {Medical Physics},
+  Year                     = {2007},
+  Number                   = {2},
+  Pages                    = {773-785},
+  Volume                   = {34}
+}
+
 @Article{Dur14b,
   Title                    = {The role of numerical boundary procedures in the stability of perfectly matched layers},
   Author                   = {Duru, K.},
@@ -5139,6 +5540,18 @@ @Article{EnMa77
   Volume                   = {31}
 }
 
+@Article{epanomeritakis2008newton,
+  Title                    = {A {N}ewton-{CG} method for large-scale three-dimensional elastic full-waveform seismic inversion},
+  Author                   = {Epanomeritakis, Ioannis and Ak{\c{c}}elik, Volkan and Ghattas, Omar and Bielak, Jacobo},
+  Journal                  = {Inverse Problems},
+  Year                     = {2008},
+  Number                   = {3},
+  Pages                    = {034015},
+  Volume                   = {24},
+
+  Doi                      = {10.1088/0266-5611/24/3/034015}
+}
+
 @Article{Err97,
   Title                    = {What is an adjoint model?},
   Author                   = {Errico, Ronald M},
@@ -5282,6 +5695,17 @@ @PhdThesis{Ez2005
   Address                  = {Paris, France}
 }
 
+@Article{FaGlGi17,
+  Title                    = {Time-domain seismic modeling in viscoelastic media for full waveform inversion on heterogeneous computing platforms with {OpenCL}},
+  Author                   = {Gabriel Fabien-Ouellet and Erwan Gloaguen and Bernard Giroux},
+  Journal                  = {Computers and Geosciences},
+  Year                     = {2017},
+  Pages                    = {142-155},
+  Volume                   = {100},
+
+  Doi                      = {10.1016/j.cageo.2016.12.004}
+}
+
 @Article{FaMaPaQu97,
   Title                    = {2{D} and 3{D} elastic wave propagation by a pseudo-spectral domain decomposition method},
   Author                   = {E. Faccioli and F. Maggio and R. Paolucci and A. Quarteroni},
@@ -5323,6 +5747,18 @@ @Article{FaMo14
   Volume                   = {51}
 }
 
+@Article{FaCaPaDr14,
+  Title                    = {A comparison between ultrasonic array beamforming and super resolution imaging algorithms for non-destructive evaluation},
+  Author                   = {Chengguang Fan and Mihai Caleap and Mengchun Pan and Bruce W. Drinkwater},
+  Journal                  = {Ultrasonics},
+  Year                     = {2014},
+  Number                   = {7},
+  Pages                    = {1842-1850},
+  Volume                   = {54},
+
+  Doi                      = {10.1016/j.ultras.2013.12.012}
+}
+
 @Article{FaLiHe02,
   Title                    = {Multidomain pseudospectral time-domain simulations of scattering by objects buried in lossy media},
   Author                   = {G. X. Fan and Q. H. Liu and J. S. Hesthaven},
@@ -5737,6 +6173,30 @@ @Article{FiKeIg09
   Volume                   = {179}
 }
 
+@Article{FiTr11a,
+  Title                    = {Hessian kernels of seismic data functionals based upon adjoint techniques},
+  Author                   = {Fichtner, Andreas and Trampert, Jeannot},
+  Journal                  = gji,
+  Year                     = {2011},
+  Number                   = {2},
+  Pages                    = {775-798},
+  Volume                   = {185},
+
+  Doi                      = {10.1111/j.1365-246X.2011.04966.x}
+}
+
+@Article{FiTr11b,
+  Title                    = {Resolution analysis in full waveform inversion},
+  Author                   = {Fichtner, Andreas and Trampert, Jeannot},
+  Journal                  = gji,
+  Year                     = {2011},
+  Number                   = {3},
+  Pages                    = {1604-1624},
+  Volume                   = {187},
+
+  Doi                      = {10.1111/j.1365-246X.2011.05218.x}
+}
+
 @Article{FiCaDePrRoTaThWu00,
   Title                    = {Time-reversed acoutics},
   Author                   = {Mathias Fink and Didier Cassereau and Arnaud Derode and Claire Prada and Philippe Roux and Mickael Tanter and Jean-Louis Thomas and F. Wu},
@@ -5749,6 +6209,17 @@ @Article{FiCaDePrRoTaThWu00
   Doi                      = {10.1088/0034-4885/63/12/202}
 }
 
+@InProceedings{FiPrWuCa89,
+  Title                    = {Self-focusing in inhomogeneous media with time reversal acoustic mirrors},
+  Author                   = {M. Fink and C. Prada and F. Wu and D. Cassereau},
+  Booktitle                = {Proceedings of the IEEE Ultrasonics Symposium},
+  Year                     = {1989},
+  Pages                    = {681-686},
+  Volume                   = {2},
+
+  Doi                      = {10.1109/ULTSYM.1989.67072}
+}
+
 @Article{Fis90,
   Title                    = {Analysis and application of a parallel spectral element method for the solution of the {N}avier-{S}tokes equations},
   Author                   = {P. F. Fischer},
@@ -5812,13 +6283,42 @@ @Article{Fish2
   Volume                   = {81}
 }
 
+@Article{flannery1987three,
+  Title                    = {Three-dimensional {X}-ray microtomography},
+  Author                   = {Flannery, Brian P. and Deckman, Harry W. and Roberge, Wayne G. and D'Amico, Kevin L.},
+  Journal                  = {Science},
+  Year                     = {1987},
+  Pages                    = {1439-1445},
+  Volume                   = {237}
+}
+
 @Book{Fle91,
-  Title                    = {Computational Fluid Dynamics},
-  Author                   = {C. A. J. Fletcher},
+  Title                    = {Computational techniques for fluid dynamics 2: {S}pecific techniques for different flow categories},
+  Author                   = {Clive A. J. Fletcher},
   Publisher                = {Springer-Verlag},
-  Year                     = {1991},
+  Year                     = {1988},
 
-  Address                  = {New York}
+  Address                  = {Berlin, Germany}
+}
+
+@Book{Fle87,
+  Title                    = {Practical methods of optimization},
+  Author                   = {Fletcher, R.},
+  Publisher                = {Wiley-Interscience},
+  Year                     = {1987},
+
+  Address                  = {New York, USA},
+  Edition                  = {2nd}
+}
+
+@Article{FoldsLoggins1977,
+  Title                    = {Transmission and reflection of ultrasonic waves in layered media},
+  Author                   = {Folds, D. L. and Loggins, C. D.},
+  Journal                  = jasa,
+  Year                     = {1977},
+  Number                   = {5},
+  Pages                    = {1102-1109},
+  Volume                   = {62}
 }
 
 @Article{taf,
@@ -5956,6 +6456,18 @@ @Article{FrVi92
   Volume                   = {82}
 }
 
+@Article{Freedman82,
+  Title                    = {On the `overlapping resonances' concept of acoustic transmission through an elastic plate, {I}: {A}n examination of properties},
+  Author                   = {A. Freedman},
+  Journal                  = {Journal of Sound and Vibration},
+  Year                     = {1982},
+  Number                   = {2},
+  Pages                    = {181-195},
+  Volume                   = {82},
+
+  Doi                      = {10.1016/0022-460X(82)90528-4}
+}
+
 @Article{FrDa95,
   Title                    = {Complete synthetic seismograms for a spherically-symmetric {E}arth by a numerical computation of the {G}reen's function in the frequency domain},
   Author                   = {Wolfgang Friederich and J\"org Dalkolmo},
@@ -6253,6 +6765,24 @@ @Article{Gar56
   Volume                   = {234}
 }
 
+@PhdThesis{Gau16,
+  Title                    = {Analyse acoustique et physico-chimique du couplage de solides \'elastiques : \'etude de l'adh\'esion dans les collages structuraux},
+  Author                   = {Camille Gauthier},
+  School                   = {University of Normandie Le Havre, France},
+  Year                     = {2016}
+}
+
+@Article{GaElGaPrLeIz17,
+  Title                    = {Lamb waves characterization of adhesion levels in aluminum/epoxy bi-layers with different cohesive and adhesive properties},
+  Author                   = {Camille Gauthier and Mounsif Ech-Cherif El-Kettani and Jocelyne Galy and Mihai Predoi and Damien Leduc and Jean-Louis Izbicki},
+  Journal                  = {International Journal of Adhesion and Adhesives},
+  Year                     = {2017},
+  Pages                    = {15-20},
+  Volume                   = {74},
+
+  Doi                      = {10.1016/j.ijadhadh.2016.12.002}
+}
+
 @Article{GoViTa86,
   Title                    = {Two-dimensional non-linear inversion of seismic waveforms: numerical results},
   Author                   = {O. Gauthier and J. Virieux and A. Tarantola},
@@ -6262,6 +6792,18 @@ @Article{GoViTa86
   Volume                   = {51}
 }
 
+@Article{Gavric95,
+  Title                    = {Computation of propagative waves in free rail using a finite element technique},
+  Author                   = {L. Gavri\'c},
+  Journal                  = {Journal of Sound and Vibration},
+  Year                     = {1995},
+  Number                   = {3},
+  Pages                    = {531-543},
+  Volume                   = {185},
+
+  Doi                      = {10.1006/jsvi.1995.0398}
+}
+
 @Article{Gaz81,
   Title                    = {Modeling of the acoustic wave equation with transform methods},
   Author                   = {J. Gazdag},
@@ -6299,6 +6841,16 @@ @Article{GazWal66
   Volume                   = {5}
 }
 
+@Article{GeWaWa14,
+  Title                    = {Accurate modeling of {PZT}-induced {L}amb wave propagation in structures by using a novel spectral finite element method},
+  Author                   = {Luyao Ge and Xinwei Wang and Feng Wang},
+  Journal                  = {Smart Materials and Structures},
+  Year                     = {2014},
+  Number                   = {9},
+  Pages                    = {095018},
+  Volume                   = {23}
+}
+
 @Article{GeKe04,
   Title                    = {Computing in the past with forward integration},
   Author                   = {C. W. Gear and Ioannis G. Kevrekidis},
@@ -6374,6 +6926,18 @@ @InCollection{GeLhOmFoSc04
   Volume                   = {23}
 }
 
+@Article{GeDeFiTa13,
+  Title                    = {Ultrasound elastography: {P}rinciples and techniques},
+  Author                   = {J.-L. Gennisson and T. Deffieux and M. Fink and M. Tanter},
+  Journal                  = {Diagnostic and Interventional Imaging},
+  Year                     = {2013},
+  Number                   = {5},
+  Pages                    = {487-495},
+  Volume                   = {94},
+
+  Doi                      = {10.1016/j.diii.2013.01.022}
+}
+
 @Article{GeOsDeMeNeGo09,
   Title                    = {Density functional theory calculation on many-cores hybrid central processing unit-graphic processing unit architectures},
   Author                   = {Luigi Genovese and Matthieu Ospici and Thierry Deutsch and Jean-Fran\c{c}ois M\'{e}haut and Alexey Neelov and Stefan Goedecker},
@@ -6695,7 +7259,7 @@ @InProceedings{Goodnight:2003:AMS
 }
 
 @Book{GoChRo10,
-  Title                    = {Spectral Finite Element Method: {W}ave Propagation, Diagnostics and Control in Anisotropic and Inhomogeneous Structures},
+  Title                    = {Spectral finite element method: {W}ave propagation, diagnostics and control in anisotropic and inhomogeneous structures},
   Author                   = {Srinivasan Gopalakrishnan and Abir Chakraborty and Roy Mahapatra, Debiprosad},
   Publisher                = {Springer},
   Year                     = {2010}
@@ -6747,7 +7311,7 @@ @TechReport{cg1001
 }
 
 @PhdThesis{cgthesis,
-  Title                    = {Etude de changements d'\'echelle en approximation - ajustement spline sur des morceaux de surfaces},
+  Title                    = {{\'E}tude de changements d'\'echelle en approximation - ajustement spline sur des morceaux de surfaces},
   Author                   = {C. Gout},
   School                   = {Universit\'e de Pau et des Pays de l'Adour},
   Year                     = {1997},
@@ -6795,6 +7359,16 @@ @Article{GoMa07
   Volume                   = {33}
 }
 
+@InCollection{Gra94,
+  Title                    = {{\'E}tude des structures crustales dans une portion de la cha\^{i}ne et leur relation avec les bassins s\'edimentaires, {A}pplication aux {P}yr\'en\'ees occidentales},
+  Author                   = {Grandjean, G.},
+  Booktitle                = {Bulletin des Centres de Recherche en Exploration-Production Elf-Aquitaine},
+  Publisher                = {Soci\'et\'e Nationale Elf-Aquitaine Production},
+  Year                     = {1994},
+  Number                   = {18},
+  Pages                    = {391-420}
+}
+
 @InCollection{Gra99,
   Title                    = {Three-dimensional computer simulations of realistic earthquake ground motions in regions of deep sedimentary basin},
   Author                   = {R. W. Graves},
@@ -6843,6 +7417,17 @@ @Book{GrRe96
   Year                     = {1996}
 }
 
+@InProceedings{Greve2005,
+  Title                    = {Use of {L}amb waves to monitor plates: experiments and simulations},
+  Author                   = {D. W. Greve and J. J. Neumann and J. H. Nieuwenhuis and I. J. Oppenheim and N. L. Tyson},
+  Booktitle                = {Proceedings of SPIE Smart Structures and Materials 2005: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems},
+  Year                     = {2005},
+  Editor                   = {Masayoshi Tomizuka},
+  Volume                   = {5765},
+
+  Doi                      = {10.1117/12.599038}
+}
+
 @Article{GrZa10,
   Title                    = {A multi-{GPU} accelerated solver for the three-dimensional two-phase incompressible {N}avier-{S}tokes equations},
   Author                   = {Michael Griebel and Peter Zaspel},
@@ -7010,7 +7595,7 @@ @Article{GuBa86b
 }
 
 @Article{Guillermin2013,
-  Title                    = {Quantitative non-linear ultrasonic imaging of targets with significant acoustic impedance contrast--an experimental study},
+  Title                    = {Quantitative non-linear ultrasonic imaging of targets with significant acoustic impedance contrast -- {A}n experimental study},
   Author                   = {Guillermin, R/'egine and Lasaygues, Philippe and Rabau, Guy and Lefebvre, Jean-Pierre},
   Journal                  = jasa,
   Year                     = {2013},
@@ -7086,6 +7671,19 @@ @Article{HeSa06
   Volume                   = {28}
 }
 
+@InCollection{hubscher2014reflection,
+  Title                    = {Reflection/refraction seismology},
+  Author                   = {H{\"u}bscher, Christian and Gohl, Karsten},
+  Booktitle                = {Encyclopedia of Marine Geosciences},
+  Publisher                = {Springer Netherlands},
+  Year                     = {2014},
+  Editor                   = {Harff J. and Meschede M. and Petersen S. and Thiede J.},
+  Pages                    = {1-15},
+
+  Doi                      = {10.1007/978-94-007-6644-0\_128-1},
+  Journal                  = {Encyclopedia of Marine Geosciences}
+}
+
 @Article{Hor2,
   Title                    = {Pseudo-differential Operators and Non Elliptic Boundary Problems},
   Author                   = {L. H\o{}rmander},
@@ -7104,6 +7702,16 @@ @Article{Hor1
   Volume                   = {18}
 }
 
+@Article{HaCh10,
+  Title                    = {Optimizing a spectral element for modeling {PZT}-induced {L}amb wave propagation in thin plates},
+  Author                   = {Sungwon Ha and Fu-Kuo Chang},
+  Journal                  = {Smart Materials and Structures},
+  Year                     = {2010},
+  Number                   = {1},
+  Pages                    = {015015},
+  Volume                   = {19}
+}
+
 @Article{Ha_2009_WIU,
   Title                    = {Waveform inversion using a back-propagation algorithm and a {H}uber function norm},
   Author                   = {Taeyoung Ha and Wookeen Chung and Changsoo Shin},
@@ -7579,6 +8187,18 @@ @Article{Hickey97
   Volume                   = {102}
 }
 
+@Article{Hic02,
+  Title                    = {Arbitrary source and receiver positioning in finite-difference schemes using {K}aiser windowed sinc functions},
+  Author                   = {Graham J. Hicks},
+  Journal                  = geophysics,
+  Year                     = {2002},
+  Number                   = {1},
+  Pages                    = {156-165},
+  Volume                   = {67},
+
+  Doi                      = {10.1190/1.1451454}
+}
+
 @Article{Hig91,
   Title                    = {Absorbing boundary conditions for elastic waves},
   Author                   = {R. L. Higdon},
@@ -7653,6 +8273,18 @@ @Article{Hol87
   Volume                   = {35}
 }
 
+@Article{HoDrWi04,
+  Title                    = {The post-processing of ultrasonic array data using the total focusing method},
+  Author                   = {Holmes, C. and Drinkwater, B. and Wilcox, P.},
+  Journal                  = {Insight - Non-Destructive Testing and Condition Monitoring},
+  Year                     = {2004},
+  Number                   = {11},
+  Pages                    = {677-680},
+  Volume                   = {46},
+
+  Doi                      = {10.1784/insi.46.11.677.52285}
+}
+
 @Article{Holzer2009,
   Title                    = {Hip fractures and the contribution of cortical versus trabecular bone to femoral neck strength},
   Author                   = {Holzer, Gerold and von Skrbensky, Gobert and Holzer, Lukas A. and Pichl, Wolfgang},
@@ -7709,6 +8341,15 @@ @Article{dehoop2
   Volume                   = {64}
 }
 
+@Article{HoraCervena2012,
+  Title                    = {Determination of {L}amb wave dispersion curves by means of {F}ourier transform},
+  Author                   = {Hora, Petr and {\v{C}}erven{\'a}, Olga},
+  Journal                  = {Applied and Computational Mechanics},
+  Year                     = {2012},
+  Pages                    = {5-16},
+  Volume                   = {6}
+}
+
 @Article{HoUeTa90,
   Title                    = {Seismic response in three dimensional sedimentary basin due to plane {{\it S}} wave incidence},
   Author                   = {M. Horike and H. Uebayashi and T. Takeuchi},
@@ -7819,8 +8460,32 @@ @Article{Huang95
   Volume                   = {51}
 }
 
+@Article{HuLiWa10,
+  Title                    = {A parallel {3-D} staggered grid pseudospectral time domain method for ground-penetrating radar wave simulation},
+  Author                   = {Huang, Qinghua and Li, Zhanhui and Wang, Yanbin},
+  Journal                  = jgr,
+  Year                     = {2010},
+  Number                   = {B12},
+  Pages                    = {B12101},
+  Volume                   = {115},
+
+  Doi                      = {10.1029/2010JB007711}
+}
+
+@Article{HuYaToZh16,
+  Title                    = {{3D} nearly analytic central difference method for computation of sensitivity kernels of wave-equation-based seismic tomography},
+  Author                   = {Huang, Xueyuan and Yang, Dinghui and Tong, Ping and Zhou, Yanjie},
+  Journal                  = bssa,
+  Year                     = {2016},
+  Number                   = {6},
+  Pages                    = {2877-2899},
+  Volume                   = {106},
+
+  Doi                      = {10.1785/0120150309}
+}
+
 @Article{Hud77,
-  Title                    = {Scattered waves in the coda of {P}},
+  Title                    = {Scattered waves in the coda of {$P$}},
   Author                   = {Hudson, J. A.},
   Journal                  = jgr,
   Year                     = {1977},
@@ -8200,6 +8865,18 @@ @Article{IsBlMu16
   Doi                      = {10.1111/1365-2478.12370}
 }
 
+@Article{Ismaili09,
+  Title                    = {Determination of epoxy film parameters in a three-layer metal/adhesive/metal structure},
+  Author                   = {N. A. Ismaili and D. Chenouni and Z. Lakhliai and M. E. C. El-Kettani and B. Morvan and J.-L. Izbicki},
+  Journal                  = ieeetuffc,
+  Year                     = {2009},
+  Number                   = {9},
+  Pages                    = {1955-1959},
+  Volume                   = {56},
+
+  Doi                      = {10.1109/TUFFC.2009.1271}
+}
+
 @Article{IsrOrs81,
   Title                    = {Approximation of radiation boundary conditions},
   Author                   = {Israeli, M. and Orszag, S. A.},
@@ -8269,6 +8946,15 @@ @Article{JaGuGuMaRo13
   Volume                   = {134}
 }
 
+@Article{JaTiMa10,
+  Title                    = {3{D} architecture of a complex transcurrent rift system: {T}he example of the {B}ay of {B}iscay - {W}estern {P}yrenees},
+  Author                   = {Jammes, S. and Tiberi, C. and Manatschal, G.},
+  Journal                  = {Tectonophysics},
+  Year                     = {2010},
+  Pages                    = {210-226},
+  Volume                   = {489}
+}
+
 @Other{JaReNeGue2008,
   Title                    = {Hole-filled seamless SRTM data V4},
   Author                   = {A. Jarvis and H.I. Reuter and A. Nelson and E. Guevara},
@@ -8345,6 +9031,17 @@ @InProceedings{JeZa10
   Volume                   = {1272}
 }
 
+@Article{JeNiGaPe06,
+  Title                    = {Synthetic aperture ultrasound imaging},
+  Author                   = {J{\o}rgen Arendt Jensen and Svetoslav Ivanov Nikolov and Kim L{\o}kke Gammelmark and Morten H{\o}gholm Pedersen},
+  Journal                  = {Ultrasonics},
+  Year                     = {2006},
+  Pages                    = {e5-e15},
+  Volume                   = {44, Supplement},
+
+  Doi                      = {10.1016/j.ultras.2006.07.017}
+}
+
 @Article{Jeong_2015,
   Title                    = {Full Waveform Inversion Using {S}tudent's $t$ Distribution: a Numerical Study for Elastic Waveform Inversion and Simultaneous-Source Method},
   Author                   = {Jeong, Woodon and Kang, Minji and Kim, Shinwoong and Min, Dong-Joo and Kim, Won-Ki},
@@ -8634,6 +9331,13 @@ @Article{KaGu2006
   Pages                    = {2594-2598}
 }
 
+@Book{kak2001principles,
+  Title                    = {Principles of computerized tomographic imaging},
+  Author                   = {Kak, Avinash C. and Slaney, Malcolm},
+  Publisher                = {SIAM},
+  Year                     = {2001}
+}
+
 @Article{KaBi93,
   Title                    = {Time-domain analysis of transient structural acoustics problems based on the finite element method and a novel boundary element},
   Author                   = {L. F. Kallivokas and J. Bielak},
@@ -8661,7 +9365,7 @@ @Article{KaKaMaIm13
   Journal                  = jcp,
   Year                     = {2013},
   Number                   = {0},
-  Pages                    = {407 - 422},
+  Pages                    = {407-422},
   Volume                   = {235}
 }
 
@@ -8757,6 +9461,15 @@ @Article{karato1993
   Volume                   = {20}
 }
 
+@Article{KaWa83,
+  Title                    = {Gravity anomalies and flexure of the lithosphere at mountain ranges},
+  Author                   = {Karner, G. D. and Watts, A. B.},
+  Journal                  = jgr,
+  Year                     = {1983},
+  Pages                    = {10449-10477},
+  Volume                   = {88}
+}
+
 @Article{KaKu98a,
   Title                    = {A Fast and High-Quality Multilevel Scheme for Partitioning Irregular Graphs},
   Author                   = {George Karypis and Vipin Kumar},
@@ -8953,6 +9666,18 @@ @Article{KhBoEn12
   Doi                      = {10.1007/s11227-010-0485-0}
 }
 
+@Article{Kho91,
+  Title                    = {A {C}hebyshev spectral collocation method using a staggered grid for the stability of cylindrical flows},
+  Author                   = {Khorrami, Mehdi R.},
+  Journal                  = {International Journal for Numerical Methods in Fluids},
+  Year                     = {1991},
+  Number                   = {9},
+  Pages                    = {825-833},
+  Volume                   = {12},
+
+  Doi                      = {10.1002/fld.1650120903}
+}
+
 @Unpublished{Khronos:2008:TOS,
   Title                    = {The {OpenCL} {S}pecification, Version 1.0},
   Author                   = {{Khronos OpenCL Working Group}},
@@ -9011,13 +9736,15 @@ @InProceedings{Kim08
 }
 
 @Article{Kim2008time,
-  Title                    = {Time-domain spectral element method for built-in piezoelectric-actuator-induced lamb wave propagation analysis},
-  Author                   = {Kim, Y. and Ha, S. and Chang, F. K.},
-  Journal                  = {AIAA journal},
+  Title                    = {Time-domain spectral element method for built-in piezoelectric-actuator-induced {L}amb wave propagation analysis},
+  Author                   = {Y. Kim and S. Ha and F.-K. Chang},
+  Journal                  = {AIAA Journal},
   Year                     = {2008},
   Number                   = {3},
   Pages                    = {591-600},
-  Volume                   = {46}
+  Volume                   = {46},
+
+  Doi                      = {10.2514/1.27046}
 }
 
 @Article{KiSeSg89,
@@ -9283,8 +10010,7 @@ @InProceedings{KoLaMi08b
   Booktitle                = {Proceedings of the 8th. World Congress on Computational Mechanics (WCCM8) and the 5th. European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2008)},
   Year                     = {2008},
 
-  Address                  = {Venice, Italy},
-  Note                     = {30 June - 4 July 2008}
+  Address                  = {Venice, Italy}
 }
 
 @Article{KoLiTrSuStSh04,
@@ -9558,6 +10284,18 @@ @Article{Kop86
   Doi                      = {10.1016/0168-9274(86)90030-9}
 }
 
+@Article{KoKo96,
+  Title                    = {A conservative staggered-grid {C}hebyshev multidomain method for compressible flows},
+  Author                   = {David A. Kopriva and John H. Kolias},
+  Journal                  = jcp,
+  Year                     = {1996},
+  Number                   = {1},
+  Pages                    = {244-261},
+  Volume                   = {125},
+
+  Doi                      = {10.1006/jcph.1996.0091}
+}
+
 @Article{KoWoHu02,
   Title                    = {Computation of electromagnetic scattering with a non-conforming discontinuous spectral element method},
   Author                   = {D. A. Kopriva and S. L. Woodruff and M. Y. Hussaini},
@@ -9921,13 +10659,15 @@ @Article{Kudela07
   Author                   = {Kudela, P. and {\.Z}ak, A. and Krawczuk, M. and Ostachowicz, W.},
   Journal                  = {Journal of Sound and Vibration},
   Year                     = {2007},
-  Number                   = {4},
+  Number                   = {4-5},
   Pages                    = {728-745},
-  Volume                   = {302}
+  Volume                   = {302},
+
+  Doi                      = {10.1016/j.jsv.2006.12.016}
 }
 
 @Article{Kudela09,
-  Title                    = {3D time-domain spectral elements for stress waves modelling},
+  Title                    = {{3D} time-domain spectral elements for stress waves modelling},
   Author                   = {Kudela, P. and Ostachowicz, W.},
   Journal                  = {Journal of Physics: Conference Series},
   Year                     = {2009},
@@ -9954,6 +10694,24 @@ @InProceedings{KuBe88
   Pages                    = {1175-1177}
 }
 
+@Book{Kundu2013,
+  Title                    = {Ultrasonic and Electromagnetic {NDE} for Structure and Material Characterization: Engineering and Biomedical Applications},
+  Author                   = {Tribikram Kundu},
+  Publisher                = {CRC Press},
+  Year                     = {2012},
+  Note                     = {890 pages.}
+}
+
+@Article{Kundu97,
+  Title                    = {Material interface inspection by {L}amb waves},
+  Author                   = {Tribikram Kundu},
+  Journal                  = {International Journal of Solids and Structures},
+  Year                     = {1997},
+  Number                   = {29},
+  Pages                    = {3885-3901},
+  Volume                   = {34}
+}
+
 @Article{KuTePeBl85,
   Title                    = {A note on the influence of the elasticity on wave propagation in an acoustic/elastic coupled medium},
   Author                   = {J. T. Kuo and Y. C. Teng and P. Pecholcs and J. Blair},
@@ -9987,6 +10745,18 @@ @Article{KuDzEk06
   Volume                   = {87}
 }
 
+@Article{KuEkDz08,
+  Title                    = {Anisotropic shear-wave velocity structure of the {E}arth's mantle: {A} global model},
+  Author                   = {Kustowski, B. and Ekstr\"om, G. and Dziewo\'nski, A. M.},
+  Journal                  = jgr,
+  Year                     = {2008},
+  Number                   = {B6},
+  Pages                    = {B06306},
+  Volume                   = {113},
+
+  Doi                      = {10.1029/2007JB005169}
+}
+
 @Article{Kuz02,
   Title                    = {"Forbidden" planes for {R}ayleigh waves},
   Author                   = {S. V. Kuznetsov},
@@ -10018,6 +10788,13 @@ @Article{LaHu10
   Doi                      = {10.1016/j.jcp.2010.03.030}
 }
 
+@PhdThesis{lu2011modelisation,
+  Title                    = {Mod\'elisation de la propagation et de l'interaction d'une onde acoustique pour la t\'el\'em\'etrie de structures complexes},
+  Author                   = {L\"u, Bo},
+  School                   = {Universit\'e du Maine, France},
+  Year                     = {2011}
+}
+
 @Article{LaMaQu97,
   Title                    = {Hybrid finite element-spectral element approximation of wave propagation problems},
   Author                   = {D. J. P. Lahaye and F. Maggio and A. Quarteroni},
@@ -10147,6 +10924,30 @@ @InCollection{Lasaygues2010
   Pages                    = {441-459}
 }
 
+@Article{LaQuLeGiTaLa05,
+  Title                    = {Progress towards in vitro quantitative imaging of human femur using compound quantitative ultrasonic tomography},
+  Author                   = {Philippe Lasaygues and Edgard Ouedraogo and Jean-Pierre Lefebvre and Marcel Gindre and Marilyne Talmant and Pascal Laugier},
+  Journal                  = {Physics in Medicine and Biology},
+  Year                     = {2005},
+  Number                   = {11},
+  Pages                    = {2633},
+  Volume                   = {50},
+
+  Doi                      = {10.1088/0031-9155/50/11/013}
+}
+
+@Article{LaPi02,
+  Title                    = {Ultrasonic characterization of orthotropic elastic bovine bones},
+  Author                   = {P. Lasaygues and M. Pithioux},
+  Journal                  = {Ultrasonics},
+  Year                     = {2002},
+  Number                   = {8},
+  Pages                    = {567-573},
+  Volume                   = {39},
+
+  Doi                      = {10.1016/S0041-624X(02)00261-5}
+}
+
 @Article{LaMiTrTaKoCh05,
   Title                    = {Glacial isostatic adjustment on 3-{D} {E}arth models: a finite-volume formulation},
   Author                   = {Konstantin Latychev and Jerry X. Mitrovica and Jeroen Tromp and Mark E. Tamisiea and Dimitri Komatitsch and Christina C. Christara},
@@ -10162,7 +10963,7 @@ @Article{LaMiTrTaKoCh05
 @Article{Laugier2008,
   Title                    = {Instrumentation for in vivo ultrasonic characterization of bone strength},
   Author                   = {Laugier, Pascal},
-  Journal                  = {IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control},
+  Journal                  = ieeetuffc,
   Year                     = {2008},
   Number                   = {6},
   Pages                    = {1179-1196},
@@ -10283,7 +11084,7 @@ @Article{LeChLiKoHuTr08
 
 @Article{LeKoHuTr09,
   Title                    = {Effects of topography on seismic wave propagation: An example from northern {T}aiwan},
-  Author                   = {S. J. Lee and Dimitri Komatitsch and B. S. Huang and J. Tromp},
+  Author                   = {Shiann Jong Lee and Dimitri Komatitsch and Bor Shouh Huang and Jeroen Tromp},
   Journal                  = bssa,
   Year                     = {2009},
   Number                   = {1},
@@ -10343,6 +11144,28 @@ @Article{Lem88
   Volume                   = {67}
 }
 
+@Article{LeNiVa16,
+  Title                    = {Efficient global wave propagation adapted to 3-{D} structural complexity: a pseudospectral/spectral-element approach},
+  Author                   = {Leng, Kuangdai and Nissen-Meyer, Tarje and van Driel, Martin},
+  Journal                  = gji,
+  Year                     = {2016},
+  Number                   = {3},
+  Pages                    = {1700-1721},
+  Volume                   = {207},
+
+  Doi                      = {10.1093/gji/ggw363}
+}
+
+@Article{Lenoir97,
+  Title                    = {Subwavelength ultrasonic measurement of a very thin fluid layer thickness in a trilayer},
+  Author                   = {O. Lenoir and J.-L. Izbicki and M. Rousseau and F. Coulouvrat},
+  Journal                  = {Ultrasonics},
+  Year                     = {1997},
+  Number                   = {7},
+  Pages                    = {509-515},
+  Volume                   = {35}
+}
+
 @InProceedings{LeRa74,
   Title                    = {On a finite element method for solving the neutron transport equation ({P}roc. {S}ymposium, {M}athematical {R}esearch {C}enter)},
   Author                   = {P. Lesaint and P. A. Raviart},
@@ -10400,6 +11223,16 @@ @Article{Lev88
   Volume                   = {53}
 }
 
+@Article{Leveque2007,
+  Title                    = {Correction of diffraction effects in sound velocity and absorption measurements},
+  Author                   = {G. Leveque and E. Rosenkrantz and D. Laux},
+  Journal                  = {Measurement Science and Technology},
+  Year                     = {2007},
+  Number                   = {11},
+  Pages                    = {3458},
+  Volume                   = {18}
+}
+
 @Article{LeDaMaEaVe00,
   Title                    = {Crustal thickness of the {P}eninsular {R}anges, southern {C}alifornia, from teleseismic receiver functions},
   Author                   = {J. Lewis and S. M. Day and H. Magistrale and J. Eakins and F. L. Vernon},
@@ -10409,6 +11242,18 @@ @Article{LeDaMaEaVe00
   Volume                   = {28}
 }
 
+@Article{LiDuLiHu09,
+  Title                    = {In vivo breast sound-speed imaging with ultrasound tomography},
+  Author                   = {Li, Cuiping and Duric, Nebojsa and Littrup, Peter and Huang, Lianjie},
+  Journal                  = {Ultrasound in Medicine and Biology},
+  Year                     = {2009},
+  Number                   = {10},
+  Pages                    = {1615-1628},
+  Volume                   = {10},
+
+  Doi                      = {10.1016/j.ultrasmedbio.2009.05.011}
+}
+
 @Article{LiHeClSu14,
   Title                    = {Global synthetic seismograms using a {2-D} finite-difference method},
   Author                   = {Li, Dunzhu and Helmberger, Don and Clayton, Robert W. and Sun, Daoyuan},
@@ -10716,6 +11561,17 @@ @Article{Liu11
   Volume                   = {60}
 }
 
+@Article{LiTeXuBa17,
+  Title                    = {Higher-order triangular spectral element method with optimized cubature points for seismic wavefield modeling},
+  Author                   = {Youshan Liu and Jiwen Teng and Tao Xu and Jos\'e Badal},
+  Journal                  = jcp,
+  Year                     = {2017},
+  Note                     = {in press.},
+
+  Doi                      = {10.1016/j.jcp.2017.01.069},
+  ISSN                     = {0021-9991}
+}
+
 @Article{Lo91,
   Title                    = {Normal modes and seismograms in an anelastic rotating {E}arth},
   Author                   = {P. Lognonn\'{e}},
@@ -10734,6 +11590,16 @@ @Article{LoRo90
   Volume                   = {102}
 }
 
+@Article{loizou2008despeckle,
+  Title                    = {Despeckle filtering algorithms and software for ultrasound imaging},
+  Author                   = {Loizou, Christos P. and Pattichis, Constantinos S.},
+  Journal                  = {Synthesis lectures on algorithms and software in engineering},
+  Year                     = {2008},
+  Number                   = {1},
+  Pages                    = {1-166},
+  Volume                   = {1}
+}
+
 @Article{LoPi11,
   Title                    = {Numerical modeling of transient two-dimensional viscoelastic waves},
   Author                   = {Lombard, Bruno and Piraux, Jo{\"e}l},
@@ -10770,6 +11636,18 @@ @Article{LoPiGeVi08
   Doi                      = {10.1111/j.1365-246X.2007.03620.x}
 }
 
+@Article{LoCh14,
+  Title                    = {Modeling of piezo-induced ultrasonic wave propagation in composite structures using layered solid spectral element},
+  Author                   = {Kuldeep Lonkar and Fu-Kuo Chang},
+  Journal                  = {Structural Health Monitoring},
+  Year                     = {2014},
+  Number                   = {1},
+  Pages                    = {50-67},
+  Volume                   = {13},
+
+  Doi                      = {10.1177/1475921713500514}
+}
+
 @Article{loperlay1995,
   Title                    = {The core-mantle boundary region},
   Author                   = {D. E. Loper and T. Lay},
@@ -10842,6 +11720,15 @@ @Article{lovelyetal06
   Volume                   = {96}
 }
 
+@Article{Lowe95,
+  Title                    = {Matrix techniques for modeling ultrasonic waves in multilayered media},
+  Author                   = {Michael J. S. Lowe},
+  Journal                  = ieeetuffc,
+  Year                     = {1995},
+  Pages                    = {525-542},
+  Volume                   = {42}
+}
+
 @Article{Lu1996,
   Title                    = {Image reconstruction with acoustic measurement using distorted {B}orn iteration method},
   Author                   = {Lu, C. and Lin, J. and Chew, W. and Otto, G.},
@@ -10864,6 +11751,18 @@ @Article{LuPaXu05
   Doi                      = {10.1121/1.2114627}
 }
 
+@Article{beam,
+  Title                    = {Biomedical ultrasound beam forming},
+  Author                   = {Lu, Jian-Yu},
+  Journal                  = {Ultrasound in Medicine and Biology},
+  Year                     = {1994},
+  Number                   = {5},
+  Pages                    = {403-428},
+  Volume                   = {20},
+
+  Doi                      = {10.1002/andp.19053221004}
+}
+
 @Article{LuZh07,
   Title                    = {Perfectly matched layer for acoustic waveguide modeling - {B}enchmark calculations and perturbation analysis},
   Author                   = {Y. Y. Lu and J. Zhu},
@@ -11051,6 +11950,18 @@ @Article{MeRo00
   Volume                   = {143}
 }
 
+@Article{MeBr16,
+  Title                    = {The {SEISCOPE} optimization toolbox: {A} large-scale nonlinear optimization library based on reverse communication},
+  Author                   = {Ludovic M\'etivier and Romain Brossier},
+  Journal                  = geophysics,
+  Year                     = {2016},
+  Number                   = {2},
+  Pages                    = {F1-F15},
+  Volume                   = {81},
+
+  Doi                      = {10.1190/geo2015-0031.1}
+}
+
 @Article{MeBrLaOpVi14,
   Title                    = {A robust absorbing layer method for anisotropic seismic wave modeling},
   Author                   = {L. M\'etivier and R. Brossier and S. Labb\'e and S. Operto and J. Virieux},
@@ -11283,6 +12194,18 @@ @Article{Mal92
   Volume                   = {24}
 }
 
+@Article{VaRoCu07,
+  Title                    = {Exact wave field simulation for finite-volume scattering problems},
+  Author                   = {van Manen, Dirk-Jan and Robertsson, Johan O. A. and Andrew Curtis},
+  Journal                  = jasa,
+  Year                     = {2007},
+  Number                   = {4},
+  Pages                    = {EL115-EL121},
+  Volume                   = {122},
+
+  Doi                      = {10.1121/1.2771371}
+}
+
 @Book{MaBe88,
   Title                    = {Boundary element methods in elastodynamics},
   Author                   = {G. Manolis and D. E. Beskos},
@@ -11336,6 +12259,14 @@ @Article{MaLeAu15
   Doi                      = {10.1002/nme.4822}
 }
 
+@InProceedings{marklein2006inverse,
+  Title                    = {Inverse scattering and imaging in {NDT}: recent applications and advances},
+  Author                   = {Marklein, Ren{\'e} and Miao, Jinghong and Rahman, Mehbub-ur and Langenberg, Karl J{\"o}rg},
+  Booktitle                = {Proceedings of the European Conference on Non-Destructive Testing (ECNDT'06)},
+  Year                     = {2006},
+  Pages                    = {1-8}
+}
+
 @Article{Marq99,
   Title                    = {Three-dimensional sensitivity kernels for finite-frequency traveltimes: the banana-doughnut paradox},
   Author                   = {Marquering, Henk and Dahlen, F. A. and Nolet, Guust},
@@ -11440,6 +12371,25 @@ @Article{MaKoGeBr10
   Doi                      = {10.3970/cmes.2010.056.017}
 }
 
+@Article{MaMaTuMoFl14,
+  Title                    = {The tectono-sedimentary evolution of a hyper-extended rift basin: the example of the {A}rzacq-{M}aul\'eon rift system ({W}estern {P}yrenees, {F}rance)},
+  Author                   = {Masini, E. and Manatschal, G. and Tugend, J. and Mohn, G. and Flament, J. M.},
+  Journal                  = {International Journal of Earth Sciences},
+  Year                     = {2014},
+  Pages                    = {1569-1596},
+  Volume                   = {103}
+}
+
+@Article{MassereyEtAl2014,
+  Title                    = {High-frequency guided ultrasonic waves for hidden defect detection in multi-layered aircraft structures},
+  Author                   = {Masserey, Bernard and Raemy, Christian and Fromme, Paul},
+  Journal                  = {Ultrasonics},
+  Year                     = {2014},
+  Number                   = {7},
+  Pages                    = {1720-1728},
+  Volume                   = {54}
+}
+
 @Article{MaPr07,
   Title                    = {Poroelastic finite-difference modeling of seismic attenuation and dispersion due to mesoscopic-scale heterogeneity},
   Author                   = {Y. J. Masson and S. R. Pride},
@@ -11472,6 +12422,18 @@ @Article{MaFe98
   Volume                   = {36}
 }
 
+@Article{MaWaLiDuAn17,
+  Title                    = {Regularized dual averaging image reconstruction for full-wave ultrasound computed tomography},
+  Author                   = {Thomas P. Matthews and Kun Wang and Cuiping Li and Neb Duric and Mark A. Anastasio},
+  Journal                  = ieeetuffc,
+  Year                     = {2017},
+  Number                   = {5},
+  Pages                    = {811-825},
+  Volume                   = {64},
+
+  Doi                      = {10.1109/TUFFC.2017.2682061}
+}
+
 @Article{MaDe12,
   Title                    = {Parametric finite elements, exact sequences and perfectly matched layers},
   Author                   = {Matuszyk, Pawel J. and Demkowicz, Leszek F.},
@@ -11962,6 +12924,16 @@ @Article{MoBe94
   Volume                   = {13}
 }
 
+@Article{MoDeGe14,
+  Title                    = {Optimizing perfectly matched layers in discrete contexts},
+  Author                   = {Modave, A. and Delhez, E. and Geuzaine, C.},
+  Journal                  = ijnme,
+  Year                     = {2014},
+  Number                   = {6},
+  Pages                    = {410-437},
+  Volume                   = {99}
+}
+
 @Article{MoStMuWa15,
   Title                    = {A nodal discontinuous {G}alerkin method for reverse-time migration on {GPU} clusters},
   Author                   = {Modave, A. and St-Cyr, A. and Mulder, W. A. and Warburton, T.},
@@ -11974,6 +12946,22 @@ @Article{MoStMuWa15
   Doi                      = {10.1093/gji/ggv380}
 }
 
+@PhdThesis{Moh14,
+  Title                    = {Spectral elements for guided waves: {F}ormulation, dispersion analysis and simulation results},
+  Author                   = {Ramy Mohamed},
+  School                   = {University of Sherbrooke, Canada},
+  Year                     = {2014}
+}
+
+@Article{MoGr79,
+  Title                    = {Subduction of continental lithosphere: {S}ome constraints and uncertainties},
+  Author                   = {Molnar, P. and Gray, D.},
+  Journal                  = {Geology},
+  Year                     = {1979},
+  Pages                    = {58-62},
+  Volume                   = {7}
+}
+
 @Article{MoRi05,
   Title                    = {A Discontinuous {G}alerkin Method for Linear Symmetric Hyperbolic Systems in Inhomogeneous Media},
   Author                   = {Peter Monk and Gerard R. Richter},
@@ -12104,6 +13092,18 @@ @Article{Morita96
   Volume                   = {44}
 }
 
+@Article{Moser99,
+  Title                    = {Modeling elastic wave propagation in waveguides with the finite element method},
+  Author                   = {Friedrich Moser and Laurence J. Jacobs and Jianmin Qu},
+  Journal                  = {{NDT} \& E International},
+  Year                     = {1999},
+  Number                   = {4},
+  Pages                    = {225-234},
+  Volume                   = {32},
+
+  Doi                      = {10.1016/S0963-8695(98)00045-0}
+}
+
 @Article{MoDr89,
   Title                    = {Scattering of elastic waves by three-dimensional surface topographies},
   Author                   = {T. K. Mossessian and M. Dravinski},
@@ -12141,6 +13141,18 @@ @Article{MouDesCas96
   Volume                   = {82}
 }
 
+@Article{MoFiVaPiLaFeCaChMa14,
+  Title                    = {Placing limits to shortening evolution in the {P}yrenees: {R}ole of margin architecture and implications for the {I}beria/{E}urope convergence},
+  Author                   = {Mouthereau, F. and Filleaudeau, P. Y. and Vacherat, A. and Pik, R. and Lacombe, O. and Fellin, M. G. and Castelltort, S. and Christophoul, F. and Masini, E.},
+  Journal                  = {Tectonics},
+  Year                     = {2014},
+  Number                   = {12},
+  Pages                    = {2283-2314},
+  Volume                   = {33},
+
+  Doi                      = {10.1002/2014TC003663}
+}
+
 @Article{MuDeEtNi92,
   Title                    = {Modelling elastic fields across irregular boundaries},
   Author                   = {F. Muir and J. Dellinger and J. Etgen and D. Nichols},
@@ -12344,6 +13356,18 @@ @Article{nietal2002
   Volume                   = {296}
 }
 
+@Article{NiStClBo00,
+  Title                    = {Scattering of ultrasound in cancellous bone: predictions from a theoretical model},
+  Author                   = {Nicholson, P. H. and R. Strelitzki and R. O. Cleveland and M. L. Bouxsein},
+  Journal                  = {Journal of Biomechanics},
+  Year                     = {2000},
+  Number                   = {4},
+  Pages                    = {503-506},
+  Volume                   = {33},
+
+  Doi                      = {10.1016/S0021-9290(99)00208-0}
+}
+
 @Article{Nickolls:2008:SPP,
   Title                    = {Scalable Parallel Programming with {CUDA}},
   Author                   = {John Nickolls and Ian Buck and Michael Garland and Kevin Skadron},
@@ -12385,6 +13409,18 @@ @Article{NiSk90
   Volume                   = {11}
 }
 
+@Article{NiPaNiTr01,
+  Title                    = {On the feasibility of remote palpation using acoustic radiation force},
+  Author                   = {Kathryn R. Nightingale and Mark L. Palmeri and Roger W. Nightingale and Gregg E. Trahey},
+  Journal                  = jasa,
+  Year                     = {2001},
+  Number                   = {1},
+  Pages                    = {625-634},
+  Volume                   = {110},
+
+  Doi                      = {10.1121/1.1378344}
+}
+
 @InCollection{nirenberg72,
   Title                    = {Lectures on Linear Partial Differential Equations},
   Author                   = {L. Nirenberg},
@@ -12459,6 +13495,16 @@ @TechReport{Etopo5
   Note                     = {171 pages}
 }
 
+@Article{noble2006ultrasound,
+  Title                    = {Ultrasound image segmentation: a survey},
+  Author                   = {Noble, J. Alison and Boukerroui, Djamal},
+  Journal                  = {IEEE Transactions on Medical Imaging},
+  Year                     = {2006},
+  Number                   = {8},
+  Pages                    = {987-1010},
+  Volume                   = {25}
+}
+
 @Book{NoWr06,
   Title                    = {Numerical Optimization},
   Author                   = {Jorge Nocedal and Stephen Wright},
@@ -12716,7 +13762,7 @@ @Article{Olyslager2004
 }
 
 @Article{OpBrCoMeRiVi14,
-  Title                    = {Computationally efficient three-dimensional acoustic finite-difference frequency-domain seismic modeling in vertical transversely isotropic media with sparse direct solver},
+  Title                    = {Computationally-efficient three-dimensional acoustic finite-difference frequency-domain seismic modeling in vertical transversely isotropic media with sparse direct solver},
   Author                   = {Operto, St\'ephane and Brossier, Romain and Combe, Laure and M\'etivier, Ludovic and Ribodetti, Alessandra and Virieux, Jean},
   Journal                  = geophysics,
   Year                     = {2014},
@@ -12755,6 +13801,18 @@ @Article{Oskooi11
   Volume                   = {230}
 }
 
+@Article{OsKu10,
+  Title                    = {Wave propagation numerical models in damage detection based on the time domain spectral element method},
+  Author                   = {W. Ostachowicz and P. Kudela},
+  Journal                  = {IOP Conference Series: Materials Science and Engineering},
+  Year                     = {2010},
+  Number                   = {1},
+  Pages                    = {012068},
+  Volume                   = {10},
+
+  Doi                      = {10.1088/1757-899X/10/1/012068}
+}
+
 @Article{Ott71,
   Title                    = {Elastic wave propagation in two evenly-welded quarter-spaces},
   Author                   = {M. Ottaviani},
@@ -12823,6 +13881,28 @@ @Article{Ozgun09
   Publisher                = {IEEE}
 }
 
+@Article{OzKu07,
+  Title                    = {Non-{M}axwellian Locally-Conformal {PML} Absorbers for Finite Element Mesh Truncation},
+  Author                   = {Ozgun, Ozlem and Kuzuoglu, Mustafa},
+  Journal                  = {IEEE Transactions on Antennas and Propagation},
+  Year                     = {2007},
+  Number                   = {3},
+  Pages                    = {931-937},
+  Volume                   = {55}
+}
+
+@Article{PeHeUdMiCoTr17,
+  Title                    = {Time domain reconstruction of sound speed and attenuation in ultrasound computed tomography using full wave inversion},
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+  Journal                  = jasa,
+  Year                     = {2017},
+  Number                   = {3},
+  Pages                    = {1595-1604},
+  Volume                   = {141},
+
+  Doi                      = {10.1121/1.4976688}
+}
+
 @Book{Pac97,
   Title                    = {Parallel programming with {MPI}},
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@@ -12980,6 +14060,21 @@ @Article{Pat84
   Volume                   = {54}
 }
 
+@InCollection{Pavlakovic1997,
+  Title                    = {Disperse: {A} general purpose program for creating dispersion curves},
+  Author                   = {Pavlakovic, Brian and Lowe, Mike and Alleyne, David and Cawley, Peter},
+  Booktitle                = {Review of Progress in Quantitative Nondestructive Evaluation},
+  Publisher                = {Springer},
+  Year                     = {1997},
+
+  Address                  = {Boston, Massachusetts, USA},
+  Editor                   = {Thompson, Donald O. and Chimenti, Dale E.},
+  Pages                    = {185-192},
+  Volume                   = {16A},
+
+  Doi                      = {10.1007/978-1-4615-5947-4\_24}
+}
+
 @InCollection{Pav05,
   Title                    = {Direct imaging of the coda of teleseismic {P} waves},
   Author                   = {G. L. Pavlis},
@@ -13123,6 +14218,18 @@ @Article{PeTo95
   Volume                   = {60}
 }
 
+@Article{PeMeLi09,
+  Title                    = {Modeling of wave propagation in plate structures using three-dimensional spectral element method for damage detection},
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+  Year                     = {2009},
+  Number                   = {4-5},
+  Pages                    = {942-954},
+  Volume                   = {320},
+
+  Doi                      = {10.1016/j.jsv.2008.09.005}
+}
+
 @Article{PeYe10,
   Title                    = {Concise analysis of wave propagation using the spectral element method and identification of delamination in CF/EP composite beams},
   Author                   = {Peng, H. and Ye, L. and Meng, G. and Mustapha, S. and Li, F.},
@@ -13185,6 +14292,16 @@ @InProceedings{PeBo06
   Month                    = {January}
 }
 
+@Article{Petropoulos98,
+  Title                    = {On the Termination of the Perfectly Matched Layer with Local Absorbing Boundary Conditions},
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+  Journal                  = jcp,
+  Year                     = {1998},
+  Number                   = {2},
+  Pages                    = {665-673},
+  Volume                   = {143}
+}
+
 @Article{PeOlMa2001,
   Title                    = {Dynamic modeling of the 1992 {L}anders earthquake},
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@@ -13274,10 +14391,20 @@ @Article{PiKnSc64
   Volume                   = {69}
 }
 
+@Article{pinta,
+  Title                    = {Ultrasonic Diffraction Tomography},
+  Author                   = {Chuchart Pintavirooj and Manas Sangworasil},
+  Journal                  = {International Journal of Applied Biomedical Engineering},
+  Year                     = {2008},
+  Number                   = {1},
+  Pages                    = {34-40},
+  Volume                   = {1}
+}
+
 @Article{PiTr08,
   Title                    = {A comparison of time-domain solutions for the full-wave equation and the parabolic wave equation for a diagnostic ultrasound transducer},
   Author                   = {Gianmarco F. Pinton and Gregg E. Trahey},
-  Journal                  = {IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control},
+  Journal                  = ieeetuffc,
   Year                     = {2008},
   Number                   = {3},
   Pages                    = {730-733},
@@ -13443,6 +14570,18 @@ @Article{Poupinet83
   Volume                   = {305}
 }
 
+@Article{PrFi94,
+  Title                    = {Eigenmodes of the time reversal operator: {A} solution to selective focusing in multiple-target media},
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+  Number                   = {2},
+  Pages                    = {151-163},
+  Volume                   = {20},
+
+  Doi                      = {10.1016/0165-2125(94)90039-6}
+}
+
 @PhdThesis{prat2005,
   Title                    = {Analyse du Generalized Screen Propagator},
   Author                   = {F. Prat},
@@ -13594,6 +14733,18 @@ @Article{PuSe98
   Volume                   = {135}
 }
 
+@Article{PyWiMc92,
+  Title                    = {Adaptive time gain compensation for ultrasonic imaging},
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+  Pages                    = {205-212},
+  Volume                   = {18},
+
+  Doi                      = {10.1016/0301-5629(92)90131-S}
+}
+
 @Article{QaTs08,
   Title                    = {Lacunae based stabilization of {PML}s},
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@@ -13654,6 +14805,18 @@ @Article{Quiroga2005
   Doi                      = {10.1029/2004JB003347}
 }
 
+@Article{Qui97,
+  Title                    = {Signal acquisition and processing in medical diagnostic ultrasound},
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+  Journal                  = {IEEE Signal Processing Magazine},
+  Year                     = {1997},
+  Number                   = {1},
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+  Volume                   = {14},
+
+  Doi                      = {10.1109/79.560325}
+}
+
 @Article{Ron96,
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 @Article{RaRaFa16,
   Title                    = {Guided Wave Tomography Based on Full Waveform Inversion},
   Author                   = {J. Rao and M. Ratassepp and Z. Fan},
-  Journal                  = {IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control},
+  Journal                  = ieeetuffc,
   Year                     = {2016},
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@@ -13793,6 +14956,16 @@ @Article{RaRaFa16
   Doi                      = {10.1109/TUFFC.2016.2536144}
 }
 
+@Article{Rappaport1996Interpreting,
+  Title                    = {Interpreting and improving the {PML} absorbing boundary condition using anisotropic lossy mapping of space},
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+  Number                   = {3},
+  Pages                    = {968-974},
+  Volume                   = {32}
+}
+
 @Article{Raum2014,
   Title                    = {Ultrasound to assess bone quality},
   Author                   = {Raum, Kay and Grimal, Quentin and Varga, Peter and Barkmann, Reinhard and Gl\"uer, Claus C. and Laugier, Pascal},
@@ -13872,7 +15045,7 @@ @Article{ReKoEdHs88
 }
 
 @Article{ReLeGr98,
-  Title                    = {Circumventing Storage Limitations in Variational Data Assimilation Studies},
+  Title                    = {Circumventing storage limitations in variational data assimilation studies},
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@@ -13883,6 +15056,16 @@ @Article{ReLeGr98
   Doi                      = {10.1137/S1064827595285500}
 }
 
+@Article{Rho1996,
+  Title                    = {An ultrasonic method for measuring the elastic properties of human tibial cortical and cancellous bone},
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+  Journal                  = {Ultrasonics},
+  Year                     = {1996},
+  Number                   = {8},
+  Pages                    = {777-783},
+  Volume                   = {34}
+}
+
 @Article{Ria96,
   Title                    = {The anomalous seismic response of the ground at the {T}arzana {H}ill site during the {N}orthridge 1994 {S}outhern {C}alifornia earthquake: a resonant, sliding block?},
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@@ -14102,7 +15285,7 @@ @PhdThesis{Rod04
 
 @Article{RoSaLuMa06,
   Title                    = {Multiple scattering of elastic waves by subsurface fractures and cavities},
-  Author                   = {A. Rodr\'{\i}guez-Castellanos and F.J. S\'anchez-Sesma and F. Luz\'on and R. Martin},
+  Author                   = {A. Rodr\'{\i}guez-Castellanos and F. J. S\'anchez-Sesma and F. Luz\'on and R. Martin},
   Journal                  = bssa,
   Year                     = {2006},
   Number                   = {4A},
@@ -14158,6 +15341,18 @@ @Article{RoVaHelene
   Volume                   = {35}
 }
 
+@Article{Rokhlin2002,
+  Title                    = {Stable recursive algorithm for elastic wave propagation in layered anisotropic media: {S}tiffness matrix method},
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+  Journal                  = jasa,
+  Year                     = {2002},
+  Number                   = {3},
+  Pages                    = {822-834},
+  Volume                   = {112},
+
+  Doi                      = {10.1121/1.1497365}
+}
+
 @Article{RoLaGaRu04,
   Title                    = {High-resolution investigation of shear wave anisotropy in {D}'' beneath the {C}ocos plate},
   Author                   = {J. M. Rokosky and T. Lay and E. J. Garnero and S. A. Russel},
@@ -14322,6 +15517,16 @@ @Article{RoMaNiKu13
   Volume                   = {134}
 }
 
+@Article{RoKa84,
+  Title                    = {Flexure of the lithosphere beneath the {A}ppenine and {C}arpathian foredeep basins: {E}vidence for an insufficient topographic load},
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+  Year                     = {1984},
+  Number                   = {6},
+  Pages                    = {704-712},
+  Volume                   = {68}
+}
+
 @Article{Roy08,
   Title                    = {Stresses and displacements for some Rayleigh-type surface acoustic waves propagating on an anisotropic half space (L)},
   Author                   = {D. Royer},
@@ -14650,6 +15855,16 @@ @Article{SaGoPe14
   Volume                   = {100}
 }
 
+@Article{SaFoLaCa17,
+  Title                    = {Leveraging the accelerated processing units for seismic imaging: {A} performance and power efficiency comparison against {CPU}s and {GPU}s},
+  Author                   = {Issam Said and Pierre Fortin and Jean-Luc Lamotte and Henri Calandra},
+  Journal                  = {International Journal of High Performance Computing Applications},
+  Year                     = {2017},
+  Note                     = {in press},
+
+  Doi                      = {10.1177/1094342017696562}
+}
+
 @Article{ks,
   Title                    = {{$C^1$} splines for interpolation of rapidly varying data},
   Author                   = {K. Salkauskas},
@@ -14659,6 +15874,30 @@ @Article{ks
   Volume                   = {14}
 }
 
+@Article{SaLiRoScDu15,
+  Title                    = {Frequency domain ultrasound waveform tomography: breast imaging using a ring transducer},
+  Author                   = {G. Y. Sandhu and C. Li and O. Roy and S. Schmidt and N. Duric},
+  Journal                  = {Physics in Medicine and Biology},
+  Year                     = {2015},
+  Number                   = {14},
+  Pages                    = {5381},
+  Volume                   = {60},
+
+  Doi                      = {10.1088/0031-9155/60/14/5381}
+}
+
+@Article{SaTaCaFi02,
+  Title                    = {Shear modulus imaging with 2-{D} transient elastography},
+  Author                   = {L. Sandrin and M. Tanter and S. Catheline and M. Fink},
+  Journal                  = ieeetuffc,
+  Year                     = {2002},
+  Number                   = {4},
+  Pages                    = {426-435},
+  Volume                   = {49},
+
+  Doi                      = {10.1109/58.996560}
+}
+
 @Article{SaCoKu11,
   Title                    = {Information and linearity of time-domain complex demodulated amplitude and phase data in shallow water},
   Author                   = {Sarkar, Jit and Cornuelle, Bruce D and Kuperman, WA},
@@ -14687,6 +15926,18 @@ @Article{Sarma98
   Volume                   = {63}
 }
 
+@Article{SaRuSwFoEm98,
+  Title                    = {Shear wave elasticity imaging: a new ultrasonic technology of medical diagnostics},
+  Author                   = {Armen P. Sarvazyan and Oleg V. Rudenko and Scott D. Swanson and J. Brian Fowlkes and Stanislav Y. Emelianov},
+  Journal                  = {Ultrasound in Medicine and Biology},
+  Year                     = {1998},
+  Number                   = {9},
+  Pages                    = {1419-1435},
+  Volume                   = {24},
+
+  Doi                      = {10.1016/S0301-5629(98)00110-0}
+}
+
 @Article{SaKaSaPi01,
   Title                    = {Three-Dimensional Finite-Difference Waveform Modeling of Strong Motions Observed in the {S}endai Basin, {J}apan},
   Author                   = {Toshimi Satoh and Hiroshi Kawase and Toshiaki Sato and Arben Pitarka},
@@ -14785,6 +16036,18 @@ @Article{Schuit2004
   Doi                      = {10.1016/j.bone.2003.10.001}
 }
 
+@Article{ScFrMo10,
+  Title                    = {Spectral element modelling of wave propagation in isotropic and anisotropic shell-structures including different types of damage},
+  Author                   = {R. T. Schulte and C.-P. Fritzen and J. Moll},
+  Journal                  = {IOP Conference Series: Materials Science and Engineering},
+  Year                     = {2010},
+  Number                   = {1},
+  Pages                    = {012065},
+  Volume                   = {10},
+
+  Doi                      = {10.1088/1757-899X/10/1/012065}
+}
+
 @Article{ScFrLa16,
   Title                    = {A flexible, extendable, modular and computationally efficient approach to scattering-integral-based seismic full waveform inversion},
   Author                   = {Schumacher, Florian and Friederich, Wolfgang and Lamara, Samir},
@@ -14805,6 +16068,17 @@ @Article{Semblat11
   Volume                   = {85}
 }
 
+@Article{SeMaCa09,
+  Title                    = {Lateral heterogeneous scattering explains {$L_g$} blockage in the {P}yrenees},
+  Author                   = {Sens-Sch\"oenfelder, C. and Margerin, L. and Campillo, M.},
+  Journal                  = jgr,
+  Year                     = {2009},
+  Pages                    = {B07309},
+  Volume                   = {114},
+
+  Doi                      = {10.1029/2008JB006107}
+}
+
 @Article{Ser04,
   Title                    = {Double-grid {C}hebyshev spectral elements for acoustic wave modeling},
   Author                   = {G. Seriani},
@@ -14987,7 +16261,7 @@ @Article{ShJo06
   Journal                  = {Engineering with Computers},
   Year                     = {2008},
   Number                   = {3},
-  Pages                    = {195 - 213},
+  Pages                    = {195-213},
   Volume                   = {24},
 
   Doi                      = {10.1007/s00366-008-0091-4}
@@ -15288,6 +16562,16 @@ @Article{Ske07
   Volume                   = {44}
 }
 
+@Article{slaney1984limitations,
+  Title                    = {Limitations of imaging with first-order diffraction tomography},
+  Author                   = {Slaney, Malcolm and Kak, Avinash C. and Larsen, Lawrence E.},
+  Journal                  = {IEEE Transactions on Microwave Theory and Techniques},
+  Year                     = {1984},
+  Number                   = {8},
+  Pages                    = {860-874},
+  Volume                   = {32}
+}
+
 @Article{Slo16,
   Title                    = {Green's Function Retrieval and {M}archenko Imaging in a Dissipative Acoustic Medium},
   Author                   = {Slob, Evert},
@@ -15444,7 +16728,7 @@ @InProceedings{SpCoKa14
 }
 
 @Article{spetzleretal2001,
-  Title                    = {{Are we exceeding the limits of the great circle approximation in global surface wave tomography?}},
+  Title                    = {Are we exceeding the limits of the great circle approximation in global surface wave tomography?},
   Author                   = {J. Spetzler and J. Trampert and R. Snieder},
   Journal                  = grl,
   Year                     = {2001},
@@ -15733,6 +17017,28 @@ @Article{StViFeSi00
   Volume                   = {27}
 }
 
+@Book{SuYe2009,
+  Title                    = {Identification of damage using {L}amb waves: {F}rom fundamentals to applications},
+  Author                   = {Zhongqing Su and Lin Ye},
+  Publisher                = {Springer},
+  Year                     = {2009},
+  Volume                   = {48},
+
+  Booktitle                = {Lecture Notes in Applied and Computational Mechanics}
+}
+
+@Article{SuEtAl2006,
+  Title                    = {Guided {L}amb waves for identification of damage in composite structures: {A} review},
+  Author                   = {Zhongqing Su and Lin Ye and Ye Lu},
+  Journal                  = {Journal of Sound and Vibration},
+  Year                     = {2006},
+  Number                   = {3-5},
+  Pages                    = {753-780},
+  Volume                   = {295},
+
+  Doi                      = {10.1016/j.jsv.2006.01.020}
+}
+
 @Article{Sukum00,
   Title                    = {Extended Finite Element Method for Three-Dimensional Crack Modeling},
   Author                   = {N. Sukumar and N. Mo\"es and B. Moran and T. Belytschko},
@@ -15788,6 +17094,18 @@ @Article{Sym07
   Doi                      = {10.1190/1.2742686}
 }
 
+@Article{SyVd09,
+  Title                    = {Interface error analysis for numerical wave propagation},
+  Author                   = {Symes, William W. and Vdovina, Tetyana},
+  Journal                  = {Computational Geosciences},
+  Year                     = {2009},
+  Number                   = {3},
+  Pages                    = {363-371},
+  Volume                   = {13},
+
+  Doi                      = {10.1007/s10596-008-9124-8}
+}
+
 @Article{Syn57,
   Title                    = {Elastic waves in anisotropic media},
   Author                   = {J. L. Synge},
@@ -15895,10 +17213,20 @@ @Article{TaOk98
   Volume                   = {88}
 }
 
+@InCollection{Talmant2011,
+  Title                    = {Guided waves in cortical bone},
+  Author                   = {Talmant, Maryline and Foiret, Josquin and Minonzio, Jean-Gabriel},
+  Booktitle                = {Bone quantitative ultrasound},
+  Publisher                = {Springer Netherlands},
+  Year                     = {2011},
+  Editor                   = {Laugier, Pascal and Ha{\"\i}at, Guillaume},
+  Pages                    = {147-179}
+}
+
 @Article{TaFi14,
   Title                    = {Ultrafast imaging in biomedical ultrasound},
   Author                   = {Tanter, M. and Fink, M.},
-  Journal                  = {IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control},
+  Journal                  = ieeetuffc,
   Year                     = {2014},
   Number                   = {1},
   Pages                    = {102-119},
@@ -16194,6 +17522,18 @@ @Article{Teng03
   Volume                   = {190}
 }
 
+@Article{Terrien2007,
+  Title                    = {A combined finite element and modal decomposition method to study the interaction of {L}amb modes with micro-defects},
+  Author                   = {N. Terrien and D. Osmont and D. Royer and F. Lepoutre and A. D\'eom},
+  Journal                  = {Ultrasonics},
+  Year                     = {2007},
+  Number                   = {1},
+  Pages                    = {74-88},
+  Volume                   = {46},
+
+  Doi                      = {10.1016/j.ultras.2006.11.001}
+}
+
 @Article{EUCrust07,
   Title                    = {EuCrust-07: A new reference model for the {European} crust},
   Author                   = {M. Tesauro and M. K. Kaban and S. A. P. L. Cloetingh},
@@ -16533,6 +17873,17 @@ @Article{TolstoyBohnenstiehl2005
   Volume                   = {76}
 }
 
+@Article{ToJe04,
+  Title                    = {Compact implementation of dynamic receive apodization in ultrasound scanners},
+  Author                   = {Tomov, Borislav G. and Jensen, Jorgen A.},
+  Journal                  = {SPIE Proceedings},
+  Year                     = {2004},
+  Pages                    = {260-271},
+  Volume                   = {5373},
+
+  Doi                      = {10.1117/12.532957}
+}
+
 @Article{ToChKoBaLi14,
   Title                    = {High-resolution seismic array imaging based on a {SEM-FK} hybrid method},
   Author                   = {Ping Tong and Chen, Chin-Wu and Dimitri Komatitsch and Piero Basini and Qinya Liu},
@@ -16724,7 +18075,7 @@ @Article{TrKoHjLiZhPeBoMcFrTrHu10
 }
 
 @Article{TrKoLi08,
-  Title                    = {Spectral-Element and Adjoint Methods in Seismology},
+  Title                    = {Spectral-element and adjoint methods in seismology},
   Author                   = {Jeroen Tromp and Dimitri Komatitsch and Qinya Liu},
   Journal                  = {Communications in Computational Physics},
   Year                     = {2008},
@@ -16844,6 +18195,17 @@ @Misc{usgsLAmap
   Year                     = {2003}
 }
 
+@Article{VaMoPiBeGaMaLeTiLa14,
+  Title                    = {Thermal imprint of rift-related processes in orogens as recorded in the {P}yrenees},
+  Author                   = {Vacherat, A. and Mouthereau, F. and Pik, R. and Bernet, M. and Gautheron, C. and Masini, E. and Le Pourhiet, L. and Tibari, N. and Lahfid, A.},
+  Journal                  = epsl,
+  Year                     = {2014},
+  Pages                    = {296-306},
+  Volume                   = {408},
+
+  Doi                      = {10.1016/j.epsl.2014.10.014}
+}
+
 @Article{VaCaSaKoVi99,
   Title                    = {Elastic wave propagation in an irregularly layered medium},
   Author                   = {R. Vai and J. M. Castillo-Covarrubias and F. J. S\'anchez-Sesma and D. Komatitsch and J. P. Vilotte},
@@ -16900,7 +18262,7 @@ @Article{Val86
 @Article{Vallet2016,
   Title                    = {In vivo characterization of cortical bone using guided waves measured by axial transmission},
   Author                   = {Vallet, Quentin and Bochud, Nicolas and Chappard, Christine and Laugier, Pascal and Minonzio, Jean-Gabriel},
-  Journal                  = {IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control},
+  Journal                  = ieeetuffc,
   Year                     = {2016},
   Number                   = {9},
   Pages                    = {1361-1371},
@@ -16937,6 +18299,18 @@ @Article{VaRoUl93
   Doi                      = {10.1190/1.1443500}
 }
 
+@Article{VaRo16,
+  Title                    = {Exact wavefield reconstruction on finite-difference grids with minimal memory requirements},
+  Author                   = {Marlies Vasmel and Robertsson, Johan O. A.},
+  Journal                  = geophysics,
+  Year                     = {2016},
+  Number                   = {6},
+  Pages                    = {T303-T309},
+  Volume                   = {81},
+
+  Doi                      = {10.1190/geo2016-0060.1}
+}
+
 @Article{VeMi96,
   Title                    = {An efficient implementation of {B}\'erenger's perfectly matched layer ({PML}) for finite-difference time-domain mesh truncation},
   Author                   = {J. C. Veihl and R. Mittra},
@@ -16977,8 +18351,8 @@ @Article{Vie73
 }
 
 @Book{Vik67,
-  Title                    = {Rayleigh and Lamb waves: physical theory and applications},
-  Author                   = {I. A. Viktorov},
+  Title                    = {Rayleigh and {L}amb waves: physical theory and applications},
+  Author                   = {Igor Aleksandrovich Viktorov},
   Publisher                = {Plenum Press},
   Year                     = {1967},
 
@@ -17173,6 +18547,16 @@ @Article{WangGao12
   Volume                   = {55}
 }
 
+@Article{wang2004synthetic,
+  Title                    = {A synthetic time-reversal imaging method for structural health monitoring},
+  Author                   = {Wang, Chun H. and Rose, James T. and Chang, Fu-Kuo},
+  Journal                  = {Smart materials and structures},
+  Year                     = {2004},
+  Number                   = {2},
+  Pages                    = {415},
+  Volume                   = {13}
+}
+
 @Article{WanAch96,
   Title                    = {Lamb's problem for solids of general anisotropy},
   Author                   = {C. Y. Wang and J. D. Achenbach},
@@ -17227,6 +18611,18 @@ @Article{WaHe80
   Volume                   = {70}
 }
 
+@Article{WaMaAnLiDuAn15,
+  Title                    = {Waveform inversion with source encoding for breast sound speed reconstruction in ultrasound computed tomography},
+  Author                   = {K. Wang and T. Matthews and F. Anis and C. Li and N. Duric and M. A. Anastasio},
+  Journal                  = ieeetuffc,
+  Year                     = {2015},
+  Number                   = {3},
+  Pages                    = {475-493},
+  Volume                   = {62},
+
+  Doi                      = {10.1109/TUFFC.2014.006788}
+}
+
 @Article{Wan08a,
   Title                    = {Extraordinary degeneracy and space of degeneracy in transversely isotropic elastic media},
   Author                   = {L. Wang},
@@ -17337,7 +18733,7 @@ @Article{WaTa03
 }
 
 @Article{WaChMoKoMo16,
-  Title                    = {The deep roots of the western {P}yrenees revealed by full waveform inversion of teleseismic {P} waves},
+  Title                    = {The deep roots of the western {P}yrenees revealed by full waveform inversion of teleseismic {$P$} waves},
   Author                   = {Wang, Yi and Chevrot, S\'ebastien and Monteiller, Vadim and Komatitsch, Dimitri and Mouthereau, Fr\'ed\'eric and Manatschal, Gianreto and Sylvander, Matthieu and Diaz, Jordi and Ruiz, Mario and Grimaud, Franck and Benahmed, S\'ebastien and Pauchet, H\'el\`ene and Martin, Roland},
   Journal                  = {Geology},
   Year                     = {2016},
@@ -17376,6 +18772,13 @@ @Article{Warner2013
   Volume                   = {78}
 }
 
+@Book{Wat01,
+  Title                    = {Isostasy and flexure of the lithosphere},
+  Author                   = {Watts, A. B.},
+  Publisher                = {Cambridge University Press},
+  Year                     = {2001}
+}
+
 @Article{Wen01,
   Title                    = {Seismic evidence for a rapidly varying compositional anomaly at the base of the {E}arth's mantle beneath the {I}ndian {O}cean},
   Author                   = {Wen, L.},
@@ -17473,6 +18876,19 @@ @Article{WiStBuGh10
   Doi                      = {10.1016/j.jcp.2010.09.008}
 }
 
+@Article{Willberg2015,
+  Title                    = {Simulation Methods for Guided Wave-Based Structural Health Monitoring: {A} Review},
+  Author                   = {Willberg, C. C. and Duczek, S. S. and Vivar-Perez J. M. and Ahmad Z. B.},
+  Journal                  = {ASME. Appl. Mech. Rev.},
+  Year                     = {2015},
+  Note                     = {Paper No AMR-14-1030.},
+  Number                   = {1},
+  Pages                    = {010803},
+  Volume                   = {67},
+
+  Doi                      = {10.1115/1.4029539}
+}
+
 @Article{Williams2006,
   Title                    = {Hydroacoustic events located at the intersection of the {A}tlantis (30{$^{\circ}$}{N}) and {K}ane (23{$^{\circ}$}40'{N}) transform faults with the {M}id-{A}tlantic ridge},
   Author                   = {C. M. Williams and R. A. Stephen and D. K. Smith},
@@ -17561,6 +18977,15 @@ @Article{WiOlDa15
   Doi                      = {10.1785/0120150020}
 }
 
+@Article{Wol69,
+  Title                    = {Convergence conditions for ascent methods},
+  Author                   = {Wolfe, P.},
+  Journal                  = {SIAM Review},
+  Year                     = {1969},
+  Pages                    = {226-235},
+  Volume                   = {11}
+}
+
 @Article{Won82,
   Title                    = {Effect of surface topography on the diffraction of {{\it P}}, {{\it SV}} and {R}ayleigh waves},
   Author                   = {H. L. Wong},
@@ -17778,11 +19203,15 @@ @Article{YaWaCh07
 }
 
 @Article{YaBrMeVi16,
-  Title                    = {Wavefield reconstruction in attenuating media: a checkpointing assisted reverse-forward simulation method},
+  Title                    = {Wavefield reconstruction in attenuating media: {A} checkpointing-assisted reverse-forward simulation method},
   Author                   = {Pengliang Yang and Romain Brossier and Ludovic M\'etivier and Jean Virieux},
-  Journal                  = Geophysics,
+  Journal                  = geophysics,
   Year                     = {2016},
-  Note                     = {in press}
+  Number                   = {6},
+  Pages                    = {R349-R362},
+  Volume                   = {81},
+
+  Doi                      = {10.1190/geo2016-0082.1}
 }
 
 @Article{YaTe05,
@@ -17797,6 +19226,18 @@ @Article{YaTe05
   Doi                      = {10.1109/LGRS.2005.846835}
 }
 
+@Article{YeBeCaRoCo17,
+  Title                    = {A selective mass scaling method for shear wave propagation analyses in nearly incompressible materials},
+  Author                   = {Ye, W. and Bel-Brunon, A. and Catheline, S. and Rochette, M. and Combescure, A.},
+  Journal                  = ijnme,
+  Year                     = {2017},
+  Number                   = {2},
+  Pages                    = {155-173},
+  Volume                   = {109},
+
+  Doi                      = {10.1002/nme.5276}
+}
+
 @Article{YeHuSt94,
   Title                    = {Late {C}enozoic tectonics of the East {V}entura Basin, {T}ransverse {R}anges, {C}alifornia},
   Author                   = {R. S. Yeats and G. J. Huftile and L. T. Stitt},
@@ -17858,7 +19299,7 @@ @Article{YuWeLiZhLi14
 @Article{YuBo97,
   Title                    = {Formulation and validation of Berenger's {PML} absorbing boundary for the {FDTD} simulation of acoustic scattering},
   Author                   = {Yuan, Xiaojuen and Borup, David and Wiskin, James W and Berggren, M and Eidens, R and Johnson, SA},
-  Journal                  = {IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control},
+  Journal                  = ieeetuffc,
   Year                     = {1997},
   Number                   = {4},
   Pages                    = {816-822},
@@ -18000,6 +19441,15 @@ @Article{ZhCh91
   Volume                   = {20}
 }
 
+@Article{ZhLa95,
+  Title                    = {Why the {$L_g$} phase does not traverse oceanic crust},
+  Author                   = {Zhang, T. R. and Lay, T.},
+  Journal                  = bssa,
+  Year                     = {1995},
+  Pages                    = {1665-1678},
+  Volume                   = {85}
+}
+
 @Article{ZhSh10,
   Title                    = {Unsplit complex frequency-shifted {PML} implementation using auxiliary differential equations for seismic wave modeling},
   Author                   = {Zhang, Wei and Shen, Yang},
@@ -18019,6 +19469,16 @@ @Article{zhang2003
   Volume                   = {19}
 }
 
+@Article{ZhZh14,
+  Title                    = {Complex frequency-shifted multi-axial perfectly matched layer for elastic wave modelling on curvilinear grids},
+  Author                   = {Zhang, Zhenguo and Zhang, Wei and Chen, Xiaofei},
+  Journal                  = gji,
+  Year                     = {2014},
+  Number                   = {1},
+  Pages                    = {140-153},
+  Volume                   = {198}
+}
+
 @Article{ZhCa96,
   Title                    = {{GT-PML}: generalized theory of {P}erfectly {M}atched {L}ayers and its application to the reflectionless truncation of {F}inite-{D}ifference {T}ime-{D}omain grids},
   Author                   = {L. Zhao and A. C. Cangellaris},
@@ -18050,6 +19510,18 @@ @Article{ZhWa15
   Volume                   = {138}
 }
 
+@Article{ZhLeSaLo15,
+  Title                    = {Imaging internal structure of long bones using wave scattering theory},
+  Author                   = {Zheng, Rui and Le, Lawrence H. and Sacchi, Mauricio D. and Lou, Edmond},
+  Journal                  = {Ultrasound in Medicine and Biology},
+  Year                     = {2015},
+  Number                   = {11},
+  Pages                    = {2955-2965},
+  Volume                   = {41},
+
+  Doi                      = {10.1016/j.ultrasmedbio.2015.06.016}
+}
+
 @TechReport{ZhHu02,
   Title                    = {Anisotropic perfectly matched layers for elastic waves in {C}artesian and curvilinear coordinates},
   Author                   = {Zheng, Y. and Huang, X.},
diff --git a/doc/USER_MANUAL/manual_SPECFEM3D_Cartesian.pdf b/doc/USER_MANUAL/manual_SPECFEM3D_Cartesian.pdf
index bebcfd9ac..c3dc587af 100644
Binary files a/doc/USER_MANUAL/manual_SPECFEM3D_Cartesian.pdf and b/doc/USER_MANUAL/manual_SPECFEM3D_Cartesian.pdf differ
diff --git a/doc/USER_MANUAL/manual_SPECFEM3D_Cartesian.tex b/doc/USER_MANUAL/manual_SPECFEM3D_Cartesian.tex
index 71087992d..facd040bb 100644
--- a/doc/USER_MANUAL/manual_SPECFEM3D_Cartesian.tex
+++ b/doc/USER_MANUAL/manual_SPECFEM3D_Cartesian.tex
@@ -212,6 +212,8 @@
 
 \include{08_doing_tomography}
 
+\include{08b_performing_full_waveform_inversion_FWI_or_source_inversions}
+
 \include{09_noise_simulations}
 
 \include{10_gravity_calculations}
diff --git a/setup/constants.h.in b/setup/constants.h.in
index 822382556..2f147c5ca 100644
--- a/setup/constants.h.in
+++ b/setup/constants.h.in
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/setup/constants_tomography.h.in b/setup/constants_tomography.h.in
index e76d27aa4..5c773a2d5 100644
--- a/setup/constants_tomography.h.in
+++ b/setup/constants_tomography.h.in
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/setup/precision.h.in b/setup/precision.h.in
index 39693d262..6b369ea85 100644
--- a/setup/precision.h.in
+++ b/setup/precision.h.in
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/auxiliaries/combine_surf_data.f90 b/src/auxiliaries/combine_surf_data.f90
index 4578698b3..88924ea13 100644
--- a/src/auxiliaries/combine_surf_data.f90
+++ b/src/auxiliaries/combine_surf_data.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/auxiliaries/combine_vol_data.F90 b/src/auxiliaries/combine_vol_data.F90
index ee3351bcd..9c4a094ed 100644
--- a/src/auxiliaries/combine_vol_data.F90
+++ b/src/auxiliaries/combine_vol_data.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/auxiliaries/combine_vol_data_adios_impl.f90 b/src/auxiliaries/combine_vol_data_adios_impl.f90
index 1b66b38d8..84d4628e4 100644
--- a/src/auxiliaries/combine_vol_data_adios_impl.f90
+++ b/src/auxiliaries/combine_vol_data_adios_impl.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/auxiliaries/combine_vol_data_adios_stubs.f90 b/src/auxiliaries/combine_vol_data_adios_stubs.f90
index 0fdeb2193..e9215a365 100644
--- a/src/auxiliaries/combine_vol_data_adios_stubs.f90
+++ b/src/auxiliaries/combine_vol_data_adios_stubs.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/auxiliaries/combine_vol_data_impl.f90 b/src/auxiliaries/combine_vol_data_impl.f90
index 3da7a7a8d..8693eeb61 100644
--- a/src/auxiliaries/combine_vol_data_impl.f90
+++ b/src/auxiliaries/combine_vol_data_impl.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/auxiliaries/convolve_source_timefunction.f90 b/src/auxiliaries/convolve_source_timefunction.f90
index 078a609d8..9c25fd6fe 100644
--- a/src/auxiliaries/convolve_source_timefunction.f90
+++ b/src/auxiliaries/convolve_source_timefunction.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/auxiliaries/create_movie_shakemap_AVS_DX_GMT.f90 b/src/auxiliaries/create_movie_shakemap_AVS_DX_GMT.f90
index 6175980dd..952501f53 100644
--- a/src/auxiliaries/create_movie_shakemap_AVS_DX_GMT.f90
+++ b/src/auxiliaries/create_movie_shakemap_AVS_DX_GMT.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/check_mesh_quality/check_mesh_quality.f90 b/src/check_mesh_quality/check_mesh_quality.f90
index 87cd0b9ad..e3688629a 100644
--- a/src/check_mesh_quality/check_mesh_quality.f90
+++ b/src/check_mesh_quality/check_mesh_quality.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/check_mesh_quality/convert_skewness_to_angle.f90 b/src/check_mesh_quality/convert_skewness_to_angle.f90
index 9f734e080..d3396fd37 100644
--- a/src/check_mesh_quality/convert_skewness_to_angle.f90
+++ b/src/check_mesh_quality/convert_skewness_to_angle.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/decompose_mesh/decompose_mesh.F90 b/src/decompose_mesh/decompose_mesh.F90
index 185fa7e1b..8e8496b31 100644
--- a/src/decompose_mesh/decompose_mesh.F90
+++ b/src/decompose_mesh/decompose_mesh.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/decompose_mesh/fault_scotch.f90 b/src/decompose_mesh/fault_scotch.f90
index 59d90d03a..b60ca6e35 100644
--- a/src/decompose_mesh/fault_scotch.f90
+++ b/src/decompose_mesh/fault_scotch.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/decompose_mesh/module_database.f90 b/src/decompose_mesh/module_database.f90
index 1a7a9ab40..92c8066d7 100644
--- a/src/decompose_mesh/module_database.f90
+++ b/src/decompose_mesh/module_database.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/decompose_mesh/module_mesh.f90 b/src/decompose_mesh/module_mesh.f90
index f968f4d24..06c8c6b91 100644
--- a/src/decompose_mesh/module_mesh.f90
+++ b/src/decompose_mesh/module_mesh.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/decompose_mesh/module_partition.f90 b/src/decompose_mesh/module_partition.f90
index 928a9edfa..d9bcebe2c 100644
--- a/src/decompose_mesh/module_partition.f90
+++ b/src/decompose_mesh/module_partition.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/decompose_mesh/module_qsort.f90 b/src/decompose_mesh/module_qsort.f90
index 65c8fcd69..f0a51ad14 100644
--- a/src/decompose_mesh/module_qsort.f90
+++ b/src/decompose_mesh/module_qsort.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/decompose_mesh/part_decompose_mesh.F90 b/src/decompose_mesh/part_decompose_mesh.F90
index f35759adf..f314261df 100644
--- a/src/decompose_mesh/part_decompose_mesh.F90
+++ b/src/decompose_mesh/part_decompose_mesh.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/decompose_mesh/program_decompose_mesh.f90 b/src/decompose_mesh/program_decompose_mesh.f90
index 2793a4c8e..8225cd0c3 100644
--- a/src/decompose_mesh/program_decompose_mesh.f90
+++ b/src/decompose_mesh/program_decompose_mesh.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/decompose_mesh/program_decompose_mesh_mpi.f90 b/src/decompose_mesh/program_decompose_mesh_mpi.f90
index 4431db026..c3b5d8998 100644
--- a/src/decompose_mesh/program_decompose_mesh_mpi.f90
+++ b/src/decompose_mesh/program_decompose_mesh_mpi.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/calc_jacobian.f90 b/src/generate_databases/calc_jacobian.f90
index 0e87dfe45..4af736326 100644
--- a/src/generate_databases/calc_jacobian.f90
+++ b/src/generate_databases/calc_jacobian.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/create_mass_matrices.f90 b/src/generate_databases/create_mass_matrices.f90
index b3f71f102..4b043e407 100644
--- a/src/generate_databases/create_mass_matrices.f90
+++ b/src/generate_databases/create_mass_matrices.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/create_regions_mesh.f90 b/src/generate_databases/create_regions_mesh.f90
index 38050299d..5c6a19591 100644
--- a/src/generate_databases/create_regions_mesh.f90
+++ b/src/generate_databases/create_regions_mesh.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/fault_generate_databases.f90 b/src/generate_databases/fault_generate_databases.f90
index e9fc698d0..096ffd4e3 100644
--- a/src/generate_databases/fault_generate_databases.f90
+++ b/src/generate_databases/fault_generate_databases.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/finalize_databases.f90 b/src/generate_databases/finalize_databases.f90
index db57ca46b..ab2271fd3 100644
--- a/src/generate_databases/finalize_databases.f90
+++ b/src/generate_databases/finalize_databases.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/generate_databases.f90 b/src/generate_databases/generate_databases.f90
index 593fa4d09..144ec8225 100644
--- a/src/generate_databases/generate_databases.f90
+++ b/src/generate_databases/generate_databases.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/generate_databases_adios_stubs.f90 b/src/generate_databases/generate_databases_adios_stubs.f90
index 579fc1da9..b5118fa95 100644
--- a/src/generate_databases/generate_databases_adios_stubs.f90
+++ b/src/generate_databases/generate_databases_adios_stubs.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/generate_databases_par.F90 b/src/generate_databases/generate_databases_par.F90
index f34e97437..41764acd4 100644
--- a/src/generate_databases/generate_databases_par.F90
+++ b/src/generate_databases/generate_databases_par.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/get_MPI.f90 b/src/generate_databases/get_MPI.f90
index bf84ab4db..be263fef8 100644
--- a/src/generate_databases/get_MPI.f90
+++ b/src/generate_databases/get_MPI.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/get_absorbing_boundary.F90 b/src/generate_databases/get_absorbing_boundary.F90
index e6c81cc71..d1a298bce 100644
--- a/src/generate_databases/get_absorbing_boundary.F90
+++ b/src/generate_databases/get_absorbing_boundary.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/get_coupling_surfaces.f90 b/src/generate_databases/get_coupling_surfaces.f90
index b9f7f8155..f5df65fb5 100644
--- a/src/generate_databases/get_coupling_surfaces.f90
+++ b/src/generate_databases/get_coupling_surfaces.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/get_model.F90 b/src/generate_databases/get_model.F90
index f44e105dd..c5a204e39 100644
--- a/src/generate_databases/get_model.F90
+++ b/src/generate_databases/get_model.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/get_perm_color.f90 b/src/generate_databases/get_perm_color.f90
index 7dae0cda0..9f06016e0 100644
--- a/src/generate_databases/get_perm_color.f90
+++ b/src/generate_databases/get_perm_color.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/memory_eval.f90 b/src/generate_databases/memory_eval.f90
index 5f19bd4b7..83e53f161 100644
--- a/src/generate_databases/memory_eval.f90
+++ b/src/generate_databases/memory_eval.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/model_1d_cascadia.f90 b/src/generate_databases/model_1d_cascadia.f90
index 0b7694ab7..21980f019 100644
--- a/src/generate_databases/model_1d_cascadia.f90
+++ b/src/generate_databases/model_1d_cascadia.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/model_1d_prem.f90 b/src/generate_databases/model_1d_prem.f90
index 111d7b513..db4f8e2c8 100644
--- a/src/generate_databases/model_1d_prem.f90
+++ b/src/generate_databases/model_1d_prem.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/model_1d_socal.f90 b/src/generate_databases/model_1d_socal.f90
index 7bfe0e32c..ce45d4f4f 100644
--- a/src/generate_databases/model_1d_socal.f90
+++ b/src/generate_databases/model_1d_socal.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/model_aniso.f90 b/src/generate_databases/model_aniso.f90
index eba3da95a..18a52b7ac 100644
--- a/src/generate_databases/model_aniso.f90
+++ b/src/generate_databases/model_aniso.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/model_default.f90 b/src/generate_databases/model_default.f90
index 669d6b9c1..401d73626 100644
--- a/src/generate_databases/model_default.f90
+++ b/src/generate_databases/model_default.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/model_external_values.F90 b/src/generate_databases/model_external_values.F90
index b836021c7..c93ca5d96 100644
--- a/src/generate_databases/model_external_values.F90
+++ b/src/generate_databases/model_external_values.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/model_gll.f90 b/src/generate_databases/model_gll.f90
index 0793ebbbf..074641513 100644
--- a/src/generate_databases/model_gll.f90
+++ b/src/generate_databases/model_gll.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/model_gll_adios.F90 b/src/generate_databases/model_gll_adios.F90
index 646390335..f19eff154 100644
--- a/src/generate_databases/model_gll_adios.F90
+++ b/src/generate_databases/model_gll_adios.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/model_ipati.f90 b/src/generate_databases/model_ipati.f90
index 69d4e0c8f..dc7c07d48 100644
--- a/src/generate_databases/model_ipati.f90
+++ b/src/generate_databases/model_ipati.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/model_ipati_adios.F90 b/src/generate_databases/model_ipati_adios.F90
index 5c2f962fb..9db658961 100644
--- a/src/generate_databases/model_ipati_adios.F90
+++ b/src/generate_databases/model_ipati_adios.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/model_salton_trough.f90 b/src/generate_databases/model_salton_trough.f90
index 3d01d964a..757c71dc1 100644
--- a/src/generate_databases/model_salton_trough.f90
+++ b/src/generate_databases/model_salton_trough.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/model_sep.f90 b/src/generate_databases/model_sep.f90
index 4e58341d6..4bafe3a40 100644
--- a/src/generate_databases/model_sep.f90
+++ b/src/generate_databases/model_sep.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/model_sep_nompi.f90 b/src/generate_databases/model_sep_nompi.f90
index 95be12dad..2a76dec09 100644
--- a/src/generate_databases/model_sep_nompi.f90
+++ b/src/generate_databases/model_sep_nompi.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/model_tomography.f90 b/src/generate_databases/model_tomography.f90
index 2b3fdb9da..d536b0bc2 100644
--- a/src/generate_databases/model_tomography.f90
+++ b/src/generate_databases/model_tomography.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/pml_set_local_dampingcoeff.f90 b/src/generate_databases/pml_set_local_dampingcoeff.f90
index 6ad1c1c27..642da7831 100644
--- a/src/generate_databases/pml_set_local_dampingcoeff.f90
+++ b/src/generate_databases/pml_set_local_dampingcoeff.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/program_generate_databases.f90 b/src/generate_databases/program_generate_databases.f90
index 78fad3e4c..dbc805aff 100644
--- a/src/generate_databases/program_generate_databases.f90
+++ b/src/generate_databases/program_generate_databases.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/read_partition_files.f90 b/src/generate_databases/read_partition_files.f90
index d6bf2547a..9d2ee26b1 100644
--- a/src/generate_databases/read_partition_files.f90
+++ b/src/generate_databases/read_partition_files.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/read_partition_files_adios.F90 b/src/generate_databases/read_partition_files_adios.F90
index 0d7019e75..159cd51ec 100644
--- a/src/generate_databases/read_partition_files_adios.F90
+++ b/src/generate_databases/read_partition_files_adios.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/save_arrays_solver.F90 b/src/generate_databases/save_arrays_solver.F90
index 6675005f6..d10a26672 100644
--- a/src/generate_databases/save_arrays_solver.F90
+++ b/src/generate_databases/save_arrays_solver.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/save_arrays_solver_adios.F90 b/src/generate_databases/save_arrays_solver_adios.F90
index 218100af2..c3bd85d43 100644
--- a/src/generate_databases/save_arrays_solver_adios.F90
+++ b/src/generate_databases/save_arrays_solver_adios.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/save_moho_adios.F90 b/src/generate_databases/save_moho_adios.F90
index 77056a6dd..ab113a5dd 100644
--- a/src/generate_databases/save_moho_adios.F90
+++ b/src/generate_databases/save_moho_adios.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/setup_color_perm.f90 b/src/generate_databases/setup_color_perm.f90
index b72ffad53..f271b0a0d 100644
--- a/src/generate_databases/setup_color_perm.f90
+++ b/src/generate_databases/setup_color_perm.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/generate_databases/setup_mesh.f90 b/src/generate_databases/setup_mesh.f90
index 8f8ac2fc5..282a52a6a 100644
--- a/src/generate_databases/setup_mesh.f90
+++ b/src/generate_databases/setup_mesh.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/check_mesh_quality.f90 b/src/meshfem3D/check_mesh_quality.f90
index 20ebc000c..78b3f1f7f 100644
--- a/src/meshfem3D/check_mesh_quality.f90
+++ b/src/meshfem3D/check_mesh_quality.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/compute_parameters.f90 b/src/meshfem3D/compute_parameters.f90
index 83e1a9b49..5a5a42869 100644
--- a/src/meshfem3D/compute_parameters.f90
+++ b/src/meshfem3D/compute_parameters.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/create_CPML_regions.f90 b/src/meshfem3D/create_CPML_regions.f90
index dda83a6d6..f024fddd8 100644
--- a/src/meshfem3D/create_CPML_regions.f90
+++ b/src/meshfem3D/create_CPML_regions.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/create_interfaces_mesh.f90 b/src/meshfem3D/create_interfaces_mesh.f90
index abef024f5..479bbdb8d 100644
--- a/src/meshfem3D/create_interfaces_mesh.f90
+++ b/src/meshfem3D/create_interfaces_mesh.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/create_meshfem_mesh.f90 b/src/meshfem3D/create_meshfem_mesh.f90
index 625f52e17..10596afc4 100644
--- a/src/meshfem3D/create_meshfem_mesh.f90
+++ b/src/meshfem3D/create_meshfem_mesh.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/create_visual_files.f90 b/src/meshfem3D/create_visual_files.f90
index 53c5791fe..2d95a5d02 100644
--- a/src/meshfem3D/create_visual_files.f90
+++ b/src/meshfem3D/create_visual_files.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/define_subregions.f90 b/src/meshfem3D/define_subregions.f90
index 43f82a88a..591a9a8be 100644
--- a/src/meshfem3D/define_subregions.f90
+++ b/src/meshfem3D/define_subregions.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/define_subregions_heuristic.f90 b/src/meshfem3D/define_subregions_heuristic.f90
index 28266afc8..a29ec26c0 100644
--- a/src/meshfem3D/define_subregions_heuristic.f90
+++ b/src/meshfem3D/define_subregions_heuristic.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/define_superbrick.f90 b/src/meshfem3D/define_superbrick.f90
index ddf585cb0..699d3703f 100644
--- a/src/meshfem3D/define_superbrick.f90
+++ b/src/meshfem3D/define_superbrick.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/get_MPI_cutplanes_eta.f90 b/src/meshfem3D/get_MPI_cutplanes_eta.f90
index 54f27ad91..0b3631d79 100644
--- a/src/meshfem3D/get_MPI_cutplanes_eta.f90
+++ b/src/meshfem3D/get_MPI_cutplanes_eta.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/get_MPI_cutplanes_xi.f90 b/src/meshfem3D/get_MPI_cutplanes_xi.f90
index 4c2e79dc3..bbf159ad3 100644
--- a/src/meshfem3D/get_MPI_cutplanes_xi.f90
+++ b/src/meshfem3D/get_MPI_cutplanes_xi.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/get_flags_boundaries.f90 b/src/meshfem3D/get_flags_boundaries.f90
index 110b05691..449f24db2 100644
--- a/src/meshfem3D/get_flags_boundaries.f90
+++ b/src/meshfem3D/get_flags_boundaries.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/meshfem3D.F90 b/src/meshfem3D/meshfem3D.F90
index 35051ed53..d661508b4 100644
--- a/src/meshfem3D/meshfem3D.F90
+++ b/src/meshfem3D/meshfem3D.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/meshfem3D_adios_stubs.f90 b/src/meshfem3D/meshfem3D_adios_stubs.f90
index edfbb4cad..a8fa71371 100644
--- a/src/meshfem3D/meshfem3D_adios_stubs.f90
+++ b/src/meshfem3D/meshfem3D_adios_stubs.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/meshfem3D_par.f90 b/src/meshfem3D/meshfem3D_par.f90
index e501692fa..2644f3d70 100644
--- a/src/meshfem3D/meshfem3D_par.f90
+++ b/src/meshfem3D/meshfem3D_par.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/program_meshfem3D.f90 b/src/meshfem3D/program_meshfem3D.f90
index aa4b8d8a3..4cbb9def8 100644
--- a/src/meshfem3D/program_meshfem3D.f90
+++ b/src/meshfem3D/program_meshfem3D.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/read_mesh_parameter_file.f90 b/src/meshfem3D/read_mesh_parameter_file.f90
index e65b8a672..39bab4640 100644
--- a/src/meshfem3D/read_mesh_parameter_file.f90
+++ b/src/meshfem3D/read_mesh_parameter_file.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/read_value_mesh_parameters.f90 b/src/meshfem3D/read_value_mesh_parameters.f90
index ec9c8e775..6928eeb24 100644
--- a/src/meshfem3D/read_value_mesh_parameters.f90
+++ b/src/meshfem3D/read_value_mesh_parameters.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/save_databases.F90 b/src/meshfem3D/save_databases.F90
index d30189cd3..b4930941c 100644
--- a/src/meshfem3D/save_databases.F90
+++ b/src/meshfem3D/save_databases.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/save_databases_adios.F90 b/src/meshfem3D/save_databases_adios.F90
index 25f027a15..4915844c3 100644
--- a/src/meshfem3D/save_databases_adios.F90
+++ b/src/meshfem3D/save_databases_adios.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/store_boundaries.f90 b/src/meshfem3D/store_boundaries.f90
index 8d91797b5..3c609d6ff 100644
--- a/src/meshfem3D/store_boundaries.f90
+++ b/src/meshfem3D/store_boundaries.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/meshfem3D/store_coords.f90 b/src/meshfem3D/store_coords.f90
index cace9f55f..44db93515 100644
--- a/src/meshfem3D/store_coords.f90
+++ b/src/meshfem3D/store_coords.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/adios_helpers.f90 b/src/shared/adios_helpers.f90
index a1b4e8b5b..c956d5250 100644
--- a/src/shared/adios_helpers.f90
+++ b/src/shared/adios_helpers.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/adios_helpers_definitions.f90 b/src/shared/adios_helpers_definitions.f90
index 94dcddea0..26bc98e72 100644
--- a/src/shared/adios_helpers_definitions.f90
+++ b/src/shared/adios_helpers_definitions.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/adios_helpers_writers.f90 b/src/shared/adios_helpers_writers.f90
index e61cd20b5..af64c814e 100644
--- a/src/shared/adios_helpers_writers.f90
+++ b/src/shared/adios_helpers_writers.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/adios_manager.F90 b/src/shared/adios_manager.F90
index 734f4f619..d59d7a059 100644
--- a/src/shared/adios_manager.F90
+++ b/src/shared/adios_manager.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/adios_manager_stubs.f90 b/src/shared/adios_manager_stubs.f90
index 781da1b23..0f9c4b15c 100644
--- a/src/shared/adios_manager_stubs.f90
+++ b/src/shared/adios_manager_stubs.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/assemble_MPI_scalar.f90 b/src/shared/assemble_MPI_scalar.f90
index 62a2b0251..757e6ec65 100644
--- a/src/shared/assemble_MPI_scalar.f90
+++ b/src/shared/assemble_MPI_scalar.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/check_mesh_resolution.f90 b/src/shared/check_mesh_resolution.f90
index 5bbd7283e..2d015dc70 100644
--- a/src/shared/check_mesh_resolution.f90
+++ b/src/shared/check_mesh_resolution.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/create_name_database.f90 b/src/shared/create_name_database.f90
index 23a63ca43..a9cb45ebe 100644
--- a/src/shared/create_name_database.f90
+++ b/src/shared/create_name_database.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/define_derivation_matrices.f90 b/src/shared/define_derivation_matrices.f90
index bb6c95806..97b619b18 100644
--- a/src/shared/define_derivation_matrices.f90
+++ b/src/shared/define_derivation_matrices.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/detect_surface.f90 b/src/shared/detect_surface.f90
index aac2d70fe..ac95d8a39 100644
--- a/src/shared/detect_surface.f90
+++ b/src/shared/detect_surface.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/exit_mpi.f90 b/src/shared/exit_mpi.f90
index 61ab6fb6e..d588b5e5b 100644
--- a/src/shared/exit_mpi.f90
+++ b/src/shared/exit_mpi.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/get_attenuation_model.f90 b/src/shared/get_attenuation_model.f90
index 1e2b3ca08..52e6b5338 100644
--- a/src/shared/get_attenuation_model.f90
+++ b/src/shared/get_attenuation_model.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/get_element_face.f90 b/src/shared/get_element_face.f90
index 412a66895..fb495cd0f 100644
--- a/src/shared/get_element_face.f90
+++ b/src/shared/get_element_face.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/get_global.f90 b/src/shared/get_global.f90
index 6865ac9b7..33ae4fed2 100644
--- a/src/shared/get_global.f90
+++ b/src/shared/get_global.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/get_jacobian_boundaries.f90 b/src/shared/get_jacobian_boundaries.f90
index bff15577f..48b9e8ba2 100644
--- a/src/shared/get_jacobian_boundaries.f90
+++ b/src/shared/get_jacobian_boundaries.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/get_shape2D.f90 b/src/shared/get_shape2D.f90
index fef54af53..49e3a8e01 100644
--- a/src/shared/get_shape2D.f90
+++ b/src/shared/get_shape2D.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/get_shape3D.f90 b/src/shared/get_shape3D.f90
index 2465db544..daba39c9f 100644
--- a/src/shared/get_shape3D.f90
+++ b/src/shared/get_shape3D.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/gll_library.f90 b/src/shared/gll_library.f90
index 5fd3a238e..3c002fd0f 100644
--- a/src/shared/gll_library.f90
+++ b/src/shared/gll_library.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/hex_nodes.f90 b/src/shared/hex_nodes.f90
index c0eb9fec2..11848a571 100644
--- a/src/shared/hex_nodes.f90
+++ b/src/shared/hex_nodes.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/lagrange_poly.f90 b/src/shared/lagrange_poly.f90
index 8f0eb0347..1255d3a63 100644
--- a/src/shared/lagrange_poly.f90
+++ b/src/shared/lagrange_poly.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/netlib_specfun_erf.f90 b/src/shared/netlib_specfun_erf.f90
index 6d9c04e48..9d0a9abc5 100644
--- a/src/shared/netlib_specfun_erf.f90
+++ b/src/shared/netlib_specfun_erf.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/parallel.f90 b/src/shared/parallel.f90
index 4a9cd9a7a..1349159b2 100644
--- a/src/shared/parallel.f90
+++ b/src/shared/parallel.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/prepare_assemble_MPI.f90 b/src/shared/prepare_assemble_MPI.f90
index b8ae1ac6a..6905200ec 100644
--- a/src/shared/prepare_assemble_MPI.f90
+++ b/src/shared/prepare_assemble_MPI.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/read_parameter_file.F90 b/src/shared/read_parameter_file.F90
index 207a0d368..2163664b0 100644
--- a/src/shared/read_parameter_file.F90
+++ b/src/shared/read_parameter_file.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/read_topo_bathy_file.f90 b/src/shared/read_topo_bathy_file.f90
index 4f5fb769b..a09db713c 100644
--- a/src/shared/read_topo_bathy_file.f90
+++ b/src/shared/read_topo_bathy_file.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/read_value_parameters.f90 b/src/shared/read_value_parameters.f90
index 88ca11925..1744e6761 100644
--- a/src/shared/read_value_parameters.f90
+++ b/src/shared/read_value_parameters.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/recompute_jacobian.f90 b/src/shared/recompute_jacobian.f90
index d64afde11..40387c994 100644
--- a/src/shared/recompute_jacobian.f90
+++ b/src/shared/recompute_jacobian.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/safe_alloc_mod.f90 b/src/shared/safe_alloc_mod.f90
index 8901749d6..97a8406f2 100644
--- a/src/shared/safe_alloc_mod.f90
+++ b/src/shared/safe_alloc_mod.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/save_header_file.f90 b/src/shared/save_header_file.f90
index 5a7e6cadb..80450a210 100644
--- a/src/shared/save_header_file.f90
+++ b/src/shared/save_header_file.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/serial.f90 b/src/shared/serial.f90
index 7f611fd14..323ff4ce4 100644
--- a/src/shared/serial.f90
+++ b/src/shared/serial.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/shared_par.F90 b/src/shared/shared_par.F90
index 85bb32ef2..b45397a19 100644
--- a/src/shared/shared_par.F90
+++ b/src/shared/shared_par.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/sort_array_coordinates.f90 b/src/shared/sort_array_coordinates.f90
index dcb9b8aab..4d4d89782 100644
--- a/src/shared/sort_array_coordinates.f90
+++ b/src/shared/sort_array_coordinates.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/utm_geo.f90 b/src/shared/utm_geo.f90
index 1446eb50b..c720f515d 100644
--- a/src/shared/utm_geo.f90
+++ b/src/shared/utm_geo.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/shared/write_VTK_data.f90 b/src/shared/write_VTK_data.f90
index e6f7d4e68..bd41174c3 100644
--- a/src/shared/write_VTK_data.f90
+++ b/src/shared/write_VTK_data.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/assemble_MPI_vector.f90 b/src/specfem3D/assemble_MPI_vector.f90
index a13b1d75d..891d42dcc 100644
--- a/src/specfem3D/assemble_MPI_vector.f90
+++ b/src/specfem3D/assemble_MPI_vector.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/calendar.f90 b/src/specfem3D/calendar.f90
index 67c4423ba..34f292c02 100644
--- a/src/specfem3D/calendar.f90
+++ b/src/specfem3D/calendar.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/check_stability.f90 b/src/specfem3D/check_stability.f90
index ef5475704..ca8b70ec2 100644
--- a/src/specfem3D/check_stability.f90
+++ b/src/specfem3D/check_stability.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/comp_source_time_function.f90 b/src/specfem3D/comp_source_time_function.f90
index 346a724ef..dffba7af5 100644
--- a/src/specfem3D/comp_source_time_function.f90
+++ b/src/specfem3D/comp_source_time_function.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_add_sources_acoustic.f90 b/src/specfem3D/compute_add_sources_acoustic.f90
index d44eec650..98e482841 100644
--- a/src/specfem3D/compute_add_sources_acoustic.f90
+++ b/src/specfem3D/compute_add_sources_acoustic.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_add_sources_poroelastic.f90 b/src/specfem3D/compute_add_sources_poroelastic.f90
index 50a8a3456..8817d18a2 100644
--- a/src/specfem3D/compute_add_sources_poroelastic.f90
+++ b/src/specfem3D/compute_add_sources_poroelastic.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_add_sources_viscoelastic.F90 b/src/specfem3D/compute_add_sources_viscoelastic.F90
index d4f2868d8..20b66257c 100644
--- a/src/specfem3D/compute_add_sources_viscoelastic.F90
+++ b/src/specfem3D/compute_add_sources_viscoelastic.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_adj_source_frechet.f90 b/src/specfem3D/compute_adj_source_frechet.f90
index 32e3eb9f5..76812ee3f 100644
--- a/src/specfem3D/compute_adj_source_frechet.f90
+++ b/src/specfem3D/compute_adj_source_frechet.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_arrays_source.f90 b/src/specfem3D/compute_arrays_source.f90
index 2a1252bce..4ed84570d 100644
--- a/src/specfem3D/compute_arrays_source.f90
+++ b/src/specfem3D/compute_arrays_source.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_boundary_kernel.f90 b/src/specfem3D/compute_boundary_kernel.f90
index 5665f0553..c3338c31c 100644
--- a/src/specfem3D/compute_boundary_kernel.f90
+++ b/src/specfem3D/compute_boundary_kernel.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_coupling_acoustic_el.f90 b/src/specfem3D/compute_coupling_acoustic_el.f90
index 5882f6dbd..e1ab39dad 100644
--- a/src/specfem3D/compute_coupling_acoustic_el.f90
+++ b/src/specfem3D/compute_coupling_acoustic_el.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_coupling_acoustic_po.f90 b/src/specfem3D/compute_coupling_acoustic_po.f90
index 1a3fa346d..211171d5b 100644
--- a/src/specfem3D/compute_coupling_acoustic_po.f90
+++ b/src/specfem3D/compute_coupling_acoustic_po.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_coupling_poroelastic_ac.f90 b/src/specfem3D/compute_coupling_poroelastic_ac.f90
index 66c5ad964..a1a86d629 100644
--- a/src/specfem3D/compute_coupling_poroelastic_ac.f90
+++ b/src/specfem3D/compute_coupling_poroelastic_ac.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_coupling_poroelastic_el.f90 b/src/specfem3D/compute_coupling_poroelastic_el.f90
index f4ec8e517..6b76cd1cb 100644
--- a/src/specfem3D/compute_coupling_poroelastic_el.f90
+++ b/src/specfem3D/compute_coupling_poroelastic_el.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_coupling_viscoelastic_ac.f90 b/src/specfem3D/compute_coupling_viscoelastic_ac.f90
index dd692eb20..75100130a 100644
--- a/src/specfem3D/compute_coupling_viscoelastic_ac.f90
+++ b/src/specfem3D/compute_coupling_viscoelastic_ac.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_coupling_viscoelastic_po.f90 b/src/specfem3D/compute_coupling_viscoelastic_po.f90
index 425c04cde..0fb0b2b9d 100644
--- a/src/specfem3D/compute_coupling_viscoelastic_po.f90
+++ b/src/specfem3D/compute_coupling_viscoelastic_po.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_element_att_memory.f90 b/src/specfem3D/compute_element_att_memory.f90
index 38d4ca7e8..7a0c8ff27 100644
--- a/src/specfem3D/compute_element_att_memory.f90
+++ b/src/specfem3D/compute_element_att_memory.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_energy.f90 b/src/specfem3D/compute_energy.f90
index 6168b2e06..4f9c4f7f5 100644
--- a/src/specfem3D/compute_energy.f90
+++ b/src/specfem3D/compute_energy.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_forces_acoustic_NGLL5_fast.f90 b/src/specfem3D/compute_forces_acoustic_NGLL5_fast.f90
index 982c8b507..6fdb3f6ba 100644
--- a/src/specfem3D/compute_forces_acoustic_NGLL5_fast.f90
+++ b/src/specfem3D/compute_forces_acoustic_NGLL5_fast.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_forces_acoustic_NGLLnot5_generic_slow.f90 b/src/specfem3D/compute_forces_acoustic_NGLLnot5_generic_slow.f90
index 71397c646..aa4db699e 100644
--- a/src/specfem3D/compute_forces_acoustic_NGLLnot5_generic_slow.f90
+++ b/src/specfem3D/compute_forces_acoustic_NGLLnot5_generic_slow.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_forces_acoustic_calling_routine.f90 b/src/specfem3D/compute_forces_acoustic_calling_routine.f90
index b2fbde1a7..f436a0966 100644
--- a/src/specfem3D/compute_forces_acoustic_calling_routine.f90
+++ b/src/specfem3D/compute_forces_acoustic_calling_routine.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_forces_poro_fluid_part.f90 b/src/specfem3D/compute_forces_poro_fluid_part.f90
index 0ba53eb69..050ad15b7 100644
--- a/src/specfem3D/compute_forces_poro_fluid_part.f90
+++ b/src/specfem3D/compute_forces_poro_fluid_part.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_forces_poro_solid_part.f90 b/src/specfem3D/compute_forces_poro_solid_part.f90
index 0ee72b1c3..98e25c6a8 100644
--- a/src/specfem3D/compute_forces_poro_solid_part.f90
+++ b/src/specfem3D/compute_forces_poro_solid_part.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_forces_poroelastic_calling_routine.f90 b/src/specfem3D/compute_forces_poroelastic_calling_routine.f90
index f3fec1d97..33954404e 100644
--- a/src/specfem3D/compute_forces_poroelastic_calling_routine.f90
+++ b/src/specfem3D/compute_forces_poroelastic_calling_routine.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_forces_viscoelastic.f90 b/src/specfem3D/compute_forces_viscoelastic.f90
index ca802c770..44237fb19 100644
--- a/src/specfem3D/compute_forces_viscoelastic.f90
+++ b/src/specfem3D/compute_forces_viscoelastic.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_forces_viscoelastic_calling_routine.F90 b/src/specfem3D/compute_forces_viscoelastic_calling_routine.F90
index be4744116..0438a823b 100644
--- a/src/specfem3D/compute_forces_viscoelastic_calling_routine.F90
+++ b/src/specfem3D/compute_forces_viscoelastic_calling_routine.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_gradient_in_acoustic.f90 b/src/specfem3D/compute_gradient_in_acoustic.f90
index a48a43c69..6cf9d0f6d 100644
--- a/src/specfem3D/compute_gradient_in_acoustic.f90
+++ b/src/specfem3D/compute_gradient_in_acoustic.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_interpolated_dva.f90 b/src/specfem3D/compute_interpolated_dva.f90
index 4b31c20f3..098102d65 100644
--- a/src/specfem3D/compute_interpolated_dva.f90
+++ b/src/specfem3D/compute_interpolated_dva.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_kernels.f90 b/src/specfem3D/compute_kernels.f90
index 3a72c473f..0ffec2097 100644
--- a/src/specfem3D/compute_kernels.f90
+++ b/src/specfem3D/compute_kernels.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_stacey_acoustic.f90 b/src/specfem3D/compute_stacey_acoustic.f90
index 5a83fec14..7139fc19b 100644
--- a/src/specfem3D/compute_stacey_acoustic.f90
+++ b/src/specfem3D/compute_stacey_acoustic.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_stacey_poroelastic.f90 b/src/specfem3D/compute_stacey_poroelastic.f90
index 8d0c650de..a0918741a 100644
--- a/src/specfem3D/compute_stacey_poroelastic.f90
+++ b/src/specfem3D/compute_stacey_poroelastic.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/compute_stacey_viscoelastic.F90 b/src/specfem3D/compute_stacey_viscoelastic.F90
index 63475528e..3341dfc86 100644
--- a/src/specfem3D/compute_stacey_viscoelastic.F90
+++ b/src/specfem3D/compute_stacey_viscoelastic.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/convert_time.f90 b/src/specfem3D/convert_time.f90
index b6a9c35b0..7e0822f5b 100644
--- a/src/specfem3D/convert_time.f90
+++ b/src/specfem3D/convert_time.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/create_color_image.f90 b/src/specfem3D/create_color_image.f90
index 9629e3b9d..0d393f044 100644
--- a/src/specfem3D/create_color_image.f90
+++ b/src/specfem3D/create_color_image.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/detect_mesh_surfaces.f90 b/src/specfem3D/detect_mesh_surfaces.f90
index 18650a401..c2583c3c5 100644
--- a/src/specfem3D/detect_mesh_surfaces.f90
+++ b/src/specfem3D/detect_mesh_surfaces.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/fault_solver_common.f90 b/src/specfem3D/fault_solver_common.f90
index 3ced374f8..c7613e728 100644
--- a/src/specfem3D/fault_solver_common.f90
+++ b/src/specfem3D/fault_solver_common.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/fault_solver_dynamic.f90 b/src/specfem3D/fault_solver_dynamic.f90
index 31515a844..d41467481 100644
--- a/src/specfem3D/fault_solver_dynamic.f90
+++ b/src/specfem3D/fault_solver_dynamic.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/fault_solver_kinematic.f90 b/src/specfem3D/fault_solver_kinematic.f90
index 1f77e4d55..cb3d0c712 100644
--- a/src/specfem3D/fault_solver_kinematic.f90
+++ b/src/specfem3D/fault_solver_kinematic.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/finalize_simulation.f90 b/src/specfem3D/finalize_simulation.f90
index 87d307fe0..f61e094fb 100644
--- a/src/specfem3D/finalize_simulation.f90
+++ b/src/specfem3D/finalize_simulation.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/get_cmt.f90 b/src/specfem3D/get_cmt.f90
index d9244af07..14776056e 100644
--- a/src/specfem3D/get_cmt.f90
+++ b/src/specfem3D/get_cmt.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/get_force.f90 b/src/specfem3D/get_force.f90
index 7e5eda275..096568974 100644
--- a/src/specfem3D/get_force.f90
+++ b/src/specfem3D/get_force.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/gravity_perturbation.f90 b/src/specfem3D/gravity_perturbation.f90
index fd84631eb..7cc1ecb6b 100644
--- a/src/specfem3D/gravity_perturbation.f90
+++ b/src/specfem3D/gravity_perturbation.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/initialize_simulation.F90 b/src/specfem3D/initialize_simulation.F90
index 469ba500d..8fdfa3765 100644
--- a/src/specfem3D/initialize_simulation.F90
+++ b/src/specfem3D/initialize_simulation.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/iterate_time.F90 b/src/specfem3D/iterate_time.F90
index b6b1f467e..6661db5ca 100644
--- a/src/specfem3D/iterate_time.F90
+++ b/src/specfem3D/iterate_time.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/locate_receivers.f90 b/src/specfem3D/locate_receivers.f90
index 49af3224d..e670a2a0d 100644
--- a/src/specfem3D/locate_receivers.f90
+++ b/src/specfem3D/locate_receivers.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/locate_source.F90 b/src/specfem3D/locate_source.F90
index fa5c0f07f..9689f0321 100644
--- a/src/specfem3D/locate_source.F90
+++ b/src/specfem3D/locate_source.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/make_gravity.f90 b/src/specfem3D/make_gravity.f90
index 9f7b160b7..1ed05e43a 100644
--- a/src/specfem3D/make_gravity.f90
+++ b/src/specfem3D/make_gravity.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/noise_tomography.f90 b/src/specfem3D/noise_tomography.f90
index 4eb0c8606..26d93ca3f 100644
--- a/src/specfem3D/noise_tomography.f90
+++ b/src/specfem3D/noise_tomography.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/pml_allocate_arrays.f90 b/src/specfem3D/pml_allocate_arrays.f90
index b047ce5cb..acf8d34fe 100644
--- a/src/specfem3D/pml_allocate_arrays.f90
+++ b/src/specfem3D/pml_allocate_arrays.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/pml_compute_accel_contribution.f90 b/src/specfem3D/pml_compute_accel_contribution.f90
index 5b74ce591..9c26e9b00 100644
--- a/src/specfem3D/pml_compute_accel_contribution.f90
+++ b/src/specfem3D/pml_compute_accel_contribution.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/pml_compute_memory_variables.f90 b/src/specfem3D/pml_compute_memory_variables.f90
index ceaf80a07..79904f2fd 100644
--- a/src/specfem3D/pml_compute_memory_variables.f90
+++ b/src/specfem3D/pml_compute_memory_variables.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/pml_output_VTKs.f90 b/src/specfem3D/pml_output_VTKs.f90
index ee0e316c9..175fa3dda 100644
--- a/src/specfem3D/pml_output_VTKs.f90
+++ b/src/specfem3D/pml_output_VTKs.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/pml_par.f90 b/src/specfem3D/pml_par.f90
index 20054977b..de504e065 100644
--- a/src/specfem3D/pml_par.f90
+++ b/src/specfem3D/pml_par.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/prepare_timerun.F90 b/src/specfem3D/prepare_timerun.F90
index 367d931be..0f8a871d7 100644
--- a/src/specfem3D/prepare_timerun.F90
+++ b/src/specfem3D/prepare_timerun.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/program_specfem3D.f90 b/src/specfem3D/program_specfem3D.f90
index ce553cd44..95b8271fc 100644
--- a/src/specfem3D/program_specfem3D.f90
+++ b/src/specfem3D/program_specfem3D.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/read_external_stf.f90 b/src/specfem3D/read_external_stf.f90
index 90d369b16..b8d0d4245 100644
--- a/src/specfem3D/read_external_stf.f90
+++ b/src/specfem3D/read_external_stf.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/read_forward_arrays_adios.F90 b/src/specfem3D/read_forward_arrays_adios.F90
index b5e31f5cb..fdb0688fe 100644
--- a/src/specfem3D/read_forward_arrays_adios.F90
+++ b/src/specfem3D/read_forward_arrays_adios.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/read_mesh_databases.F90 b/src/specfem3D/read_mesh_databases.F90
index 43641709e..1fd109228 100644
--- a/src/specfem3D/read_mesh_databases.F90
+++ b/src/specfem3D/read_mesh_databases.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/read_mesh_databases_adios.F90 b/src/specfem3D/read_mesh_databases_adios.F90
index b24565b5b..1a66af85b 100644
--- a/src/specfem3D/read_mesh_databases_adios.F90
+++ b/src/specfem3D/read_mesh_databases_adios.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/save_adjoint_kernels.f90 b/src/specfem3D/save_adjoint_kernels.f90
index 1765130a1..8700cba77 100644
--- a/src/specfem3D/save_adjoint_kernels.f90
+++ b/src/specfem3D/save_adjoint_kernels.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/save_forward_arrays_adios.F90 b/src/specfem3D/save_forward_arrays_adios.F90
index 9c3e2bce6..1bb28bcfa 100644
--- a/src/specfem3D/save_forward_arrays_adios.F90
+++ b/src/specfem3D/save_forward_arrays_adios.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/save_kernels_adios.F90 b/src/specfem3D/save_kernels_adios.F90
index 9435aabe7..914f8a1c0 100644
--- a/src/specfem3D/save_kernels_adios.F90
+++ b/src/specfem3D/save_kernels_adios.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/setup_GLL_points.f90 b/src/specfem3D/setup_GLL_points.f90
index c6847c93b..90c4dd10b 100644
--- a/src/specfem3D/setup_GLL_points.f90
+++ b/src/specfem3D/setup_GLL_points.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/setup_movie_meshes.f90 b/src/specfem3D/setup_movie_meshes.f90
index 8777e5735..c5439e1ac 100644
--- a/src/specfem3D/setup_movie_meshes.f90
+++ b/src/specfem3D/setup_movie_meshes.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/setup_sources_receivers.f90 b/src/specfem3D/setup_sources_receivers.f90
index d3ef9a064..c8a3e83a9 100644
--- a/src/specfem3D/setup_sources_receivers.f90
+++ b/src/specfem3D/setup_sources_receivers.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/specfem3D.f90 b/src/specfem3D/specfem3D.f90
index e91c63f7a..9629f9244 100644
--- a/src/specfem3D/specfem3D.f90
+++ b/src/specfem3D/specfem3D.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/specfem3D_adios_stubs.f90 b/src/specfem3D/specfem3D_adios_stubs.f90
index bd1ed2462..f172d2016 100644
--- a/src/specfem3D/specfem3D_adios_stubs.f90
+++ b/src/specfem3D/specfem3D_adios_stubs.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/specfem3D_par.F90 b/src/specfem3D/specfem3D_par.F90
index 9ec99d3be..49a471f49 100644
--- a/src/specfem3D/specfem3D_par.F90
+++ b/src/specfem3D/specfem3D_par.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/update_displacement_LDDRK.f90 b/src/specfem3D/update_displacement_LDDRK.f90
index b18affbb6..7a450e698 100644
--- a/src/specfem3D/update_displacement_LDDRK.f90
+++ b/src/specfem3D/update_displacement_LDDRK.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/update_displacement_scheme.f90 b/src/specfem3D/update_displacement_scheme.f90
index a25f71ce1..5f988cff3 100644
--- a/src/specfem3D/update_displacement_scheme.f90
+++ b/src/specfem3D/update_displacement_scheme.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/write_movie_output.F90 b/src/specfem3D/write_movie_output.F90
index bafd7db58..b05bee996 100644
--- a/src/specfem3D/write_movie_output.F90
+++ b/src/specfem3D/write_movie_output.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/write_output_ASCII_or_binary.f90 b/src/specfem3D/write_output_ASCII_or_binary.f90
index 882aabfb3..bcf33063c 100644
--- a/src/specfem3D/write_output_ASCII_or_binary.f90
+++ b/src/specfem3D/write_output_ASCII_or_binary.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/write_output_SU.f90 b/src/specfem3D/write_output_SU.f90
index cc0ae7a39..8dc97584f 100644
--- a/src/specfem3D/write_output_SU.f90
+++ b/src/specfem3D/write_output_SU.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/specfem3D/write_seismograms.f90 b/src/specfem3D/write_seismograms.f90
index c4194156b..11b9e5930 100644
--- a/src/specfem3D/write_seismograms.f90
+++ b/src/specfem3D/write_seismograms.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/add_model_iso.f90 b/src/tomography/add_model_iso.f90
index 7c9fb6515..6c234fcf8 100644
--- a/src/tomography/add_model_iso.f90
+++ b/src/tomography/add_model_iso.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/compute_kernel_integral.f90 b/src/tomography/compute_kernel_integral.f90
index f9059420c..f60442487 100644
--- a/src/tomography/compute_kernel_integral.f90
+++ b/src/tomography/compute_kernel_integral.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/get_cg_direction.f90 b/src/tomography/get_cg_direction.f90
index 56acc1625..6a37aaaf0 100644
--- a/src/tomography/get_cg_direction.f90
+++ b/src/tomography/get_cg_direction.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/get_sd_direction.f90 b/src/tomography/get_sd_direction.f90
index a855cf7c7..d6df02171 100644
--- a/src/tomography/get_sd_direction.f90
+++ b/src/tomography/get_sd_direction.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/model_update.f90 b/src/tomography/model_update.f90
index 9ba2c9de0..3ad8d65c6 100644
--- a/src/tomography/model_update.f90
+++ b/src/tomography/model_update.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/postprocess_sensitivity_kernels/clip_sem.f90 b/src/tomography/postprocess_sensitivity_kernels/clip_sem.f90
index fd69a214b..990d1c2af 100644
--- a/src/tomography/postprocess_sensitivity_kernels/clip_sem.f90
+++ b/src/tomography/postprocess_sensitivity_kernels/clip_sem.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/postprocess_sensitivity_kernels/combine_sem.f90 b/src/tomography/postprocess_sensitivity_kernels/combine_sem.f90
index e7bf12a89..3c0209d10 100644
--- a/src/tomography/postprocess_sensitivity_kernels/combine_sem.f90
+++ b/src/tomography/postprocess_sensitivity_kernels/combine_sem.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/postprocess_sensitivity_kernels/parse_kernel_names.f90 b/src/tomography/postprocess_sensitivity_kernels/parse_kernel_names.f90
index 2c84aea19..eafd8c01e 100644
--- a/src/tomography/postprocess_sensitivity_kernels/parse_kernel_names.f90
+++ b/src/tomography/postprocess_sensitivity_kernels/parse_kernel_names.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/postprocess_sensitivity_kernels/postprocess_par.f90 b/src/tomography/postprocess_sensitivity_kernels/postprocess_par.f90
index 67f8a71fd..0514ff91f 100644
--- a/src/tomography/postprocess_sensitivity_kernels/postprocess_par.f90
+++ b/src/tomography/postprocess_sensitivity_kernels/postprocess_par.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/postprocess_sensitivity_kernels/smooth_sem.F90 b/src/tomography/postprocess_sensitivity_kernels/smooth_sem.F90
index de12696ab..21f2894fc 100644
--- a/src/tomography/postprocess_sensitivity_kernels/smooth_sem.F90
+++ b/src/tomography/postprocess_sensitivity_kernels/smooth_sem.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/read_kernels.f90 b/src/tomography/read_kernels.f90
index 6eb3dc27c..d5a1ac28d 100644
--- a/src/tomography/read_kernels.f90
+++ b/src/tomography/read_kernels.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/read_kernels_cg.f90 b/src/tomography/read_kernels_cg.f90
index 7bf03b7a3..982fb6f6a 100644
--- a/src/tomography/read_kernels_cg.f90
+++ b/src/tomography/read_kernels_cg.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/read_model.f90 b/src/tomography/read_model.f90
index a1c4bea72..9bf4ab07e 100644
--- a/src/tomography/read_model.f90
+++ b/src/tomography/read_model.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/read_parameters_tomo.f90 b/src/tomography/read_parameters_tomo.f90
index 3189fb14e..431795864 100644
--- a/src/tomography/read_parameters_tomo.f90
+++ b/src/tomography/read_parameters_tomo.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/save_external_bin_m_up.f90 b/src/tomography/save_external_bin_m_up.f90
index bfcbe0077..1e2ea3eee 100644
--- a/src/tomography/save_external_bin_m_up.f90
+++ b/src/tomography/save_external_bin_m_up.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/sum_kernels.f90 b/src/tomography/sum_kernels.f90
index 7c149255a..656cf8db8 100644
--- a/src/tomography/sum_kernels.f90
+++ b/src/tomography/sum_kernels.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/sum_preconditioned_kernels.f90 b/src/tomography/sum_preconditioned_kernels.f90
index ea1dc471c..98021b8c0 100644
--- a/src/tomography/sum_preconditioned_kernels.f90
+++ b/src/tomography/sum_preconditioned_kernels.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/tomography_par.f90 b/src/tomography/tomography_par.f90
index 1e1f77c91..0dfccc447 100644
--- a/src/tomography/tomography_par.f90
+++ b/src/tomography/tomography_par.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/write_gradient.f90 b/src/tomography/write_gradient.f90
index 8f7f5425d..ccbc8877a 100644
--- a/src/tomography/write_gradient.f90
+++ b/src/tomography/write_gradient.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/write_new_model.f90 b/src/tomography/write_new_model.f90
index a0189629a..16c63286e 100644
--- a/src/tomography/write_new_model.f90
+++ b/src/tomography/write_new_model.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/src/tomography/write_new_model_perturbations.f90 b/src/tomography/write_new_model_perturbations.f90
index 09e4989c0..f5a6ebfdf 100644
--- a/src/tomography/write_new_model_perturbations.f90
+++ b/src/tomography/write_new_model_perturbations.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_HORIZ/exit_mpi.f90 b/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_HORIZ/exit_mpi.f90
index 712c55d78..fabe07379 100644
--- a/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_HORIZ/exit_mpi.f90
+++ b/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_HORIZ/exit_mpi.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_HORIZ/get_value_parameters.f90 b/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_HORIZ/get_value_parameters.f90
index d72b602ef..a21255311 100644
--- a/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_HORIZ/get_value_parameters.f90
+++ b/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_HORIZ/get_value_parameters.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_HORIZ/rthetaphi_xyz.f90 b/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_HORIZ/rthetaphi_xyz.f90
index 6c7bf289d..b778f2e0f 100644
--- a/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_HORIZ/rthetaphi_xyz.f90
+++ b/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_HORIZ/rthetaphi_xyz.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_VERT/exit_mpi.f90 b/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_VERT/exit_mpi.f90
index 712c55d78..fabe07379 100644
--- a/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_VERT/exit_mpi.f90
+++ b/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_VERT/exit_mpi.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_VERT/get_value_parameters.f90 b/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_VERT/get_value_parameters.f90
index d72b602ef..a21255311 100644
--- a/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_VERT/get_value_parameters.f90
+++ b/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_VERT/get_value_parameters.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_VERT/rthetaphi_xyz.f90 b/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_VERT/rthetaphi_xyz.f90
index 6c7bf289d..b778f2e0f 100644
--- a/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_VERT/rthetaphi_xyz.f90
+++ b/utils/ADJOINT_TOMOGRAPHY_TOOLS/ADJOINT_TOMOGRAPHY_TOOLKIT/MODEL_VISULIZATION/SRC_MODEL_SLICE_VERT/rthetaphi_xyz.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/ADJOINT_TOMOGRAPHY_TOOLS/iterate_adj/cluster/sum_kernel/src/exit_mpi.f90 b/utils/ADJOINT_TOMOGRAPHY_TOOLS/iterate_adj/cluster/sum_kernel/src/exit_mpi.f90
index 3ecac6089..42a5bf22c 100644
--- a/utils/ADJOINT_TOMOGRAPHY_TOOLS/iterate_adj/cluster/sum_kernel/src/exit_mpi.f90
+++ b/utils/ADJOINT_TOMOGRAPHY_TOOLS/iterate_adj/cluster/sum_kernel/src/exit_mpi.f90
@@ -9,7 +9,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/ADJOINT_TOMOGRAPHY_TOOLS/iterate_adj/cluster/topo_input/combine_vol_data/combine_vol_data_mod.f90 b/utils/ADJOINT_TOMOGRAPHY_TOOLS/iterate_adj/cluster/topo_input/combine_vol_data/combine_vol_data_mod.f90
index 5639eff7f..672525dcc 100644
--- a/utils/ADJOINT_TOMOGRAPHY_TOOLS/iterate_adj/cluster/topo_input/combine_vol_data/combine_vol_data_mod.f90
+++ b/utils/ADJOINT_TOMOGRAPHY_TOOLS/iterate_adj/cluster/topo_input/combine_vol_data/combine_vol_data_mod.f90
@@ -9,7 +9,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/CMTs/cmt_frechet/make_cmtsolution_files.f90 b/utils/CMTs/cmt_frechet/make_cmtsolution_files.f90
index b638c75c9..4b6337db2 100644
--- a/utils/CMTs/cmt_frechet/make_cmtsolution_files.f90
+++ b/utils/CMTs/cmt_frechet/make_cmtsolution_files.f90
@@ -9,7 +9,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/CPML/add_CPML_layers_to_an_existing_mesh.f90 b/utils/CPML/add_CPML_layers_to_an_existing_mesh.f90
index 473f3faeb..573f756ec 100644
--- a/utils/CPML/add_CPML_layers_to_an_existing_mesh.f90
+++ b/utils/CPML/add_CPML_layers_to_an_existing_mesh.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/CPML/convert_CUBIT_SPECFEM_mesh_to_OpenDX.f90 b/utils/CPML/convert_CUBIT_SPECFEM_mesh_to_OpenDX.f90
index 0c812b62d..cb41a14cb 100644
--- a/utils/CPML/convert_CUBIT_SPECFEM_mesh_to_OpenDX.f90
+++ b/utils/CPML/convert_CUBIT_SPECFEM_mesh_to_OpenDX.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/CPML/convert_external_layers_of_a_given_mesh_to_CPML_layers.f90 b/utils/CPML/convert_external_layers_of_a_given_mesh_to_CPML_layers.f90
index 4ac015669..1001be023 100644
--- a/utils/CPML/convert_external_layers_of_a_given_mesh_to_CPML_layers.f90
+++ b/utils/CPML/convert_external_layers_of_a_given_mesh_to_CPML_layers.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/CPML/convert_mesh_files_from_ASCII_to_binary.f90 b/utils/CPML/convert_mesh_files_from_ASCII_to_binary.f90
index 754c7e5de..64d5c6646 100644
--- a/utils/CPML/convert_mesh_files_from_ASCII_to_binary.f90
+++ b/utils/CPML/convert_mesh_files_from_ASCII_to_binary.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/CPML/convert_mesh_files_from_binary_to_ASCII.f90 b/utils/CPML/convert_mesh_files_from_binary_to_ASCII.f90
index 36d58e3c5..ce56ed229 100644
--- a/utils/CPML/convert_mesh_files_from_binary_to_ASCII.f90
+++ b/utils/CPML/convert_mesh_files_from_binary_to_ASCII.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/CPML/shuffle_existing_mesh_for_tests.f90 b/utils/CPML/shuffle_existing_mesh_for_tests.f90
index 4eb7196c7..4927839fa 100644
--- a/utils/CPML/shuffle_existing_mesh_for_tests.f90
+++ b/utils/CPML/shuffle_existing_mesh_for_tests.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/Cluster/lsf/remap_database/exit_mpi.f90 b/utils/Cluster/lsf/remap_database/exit_mpi.f90
index 6ce37dc0c..8d70ec03d 100644
--- a/utils/Cluster/lsf/remap_database/exit_mpi.f90
+++ b/utils/Cluster/lsf/remap_database/exit_mpi.f90
@@ -9,7 +9,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/Cubit_or_Gmsh/convert_tetra_mesh_to_hexa_mesh_THex.f90 b/utils/Cubit_or_Gmsh/convert_tetra_mesh_to_hexa_mesh_THex.f90
index cc4ee14e1..a08c56232 100644
--- a/utils/Cubit_or_Gmsh/convert_tetra_mesh_to_hexa_mesh_THex.f90
+++ b/utils/Cubit_or_Gmsh/convert_tetra_mesh_to_hexa_mesh_THex.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/Cubit_or_Gmsh/multiply_CUBIT_Abaqus_mesh_by_1000.f90 b/utils/Cubit_or_Gmsh/multiply_CUBIT_Abaqus_mesh_by_1000.f90
index 19103c371..da4660f22 100644
--- a/utils/Cubit_or_Gmsh/multiply_CUBIT_Abaqus_mesh_by_1000.f90
+++ b/utils/Cubit_or_Gmsh/multiply_CUBIT_Abaqus_mesh_by_1000.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/Cubit_or_Gmsh/multiply_coordinates_of_the_whole_mesh_by_1000.f90 b/utils/Cubit_or_Gmsh/multiply_coordinates_of_the_whole_mesh_by_1000.f90
index e1c20cd73..1f03cc7cd 100644
--- a/utils/Cubit_or_Gmsh/multiply_coordinates_of_the_whole_mesh_by_1000.f90
+++ b/utils/Cubit_or_Gmsh/multiply_coordinates_of_the_whole_mesh_by_1000.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/Cubit_or_Gmsh/old_check_mesh_quality_CUBIT_Abaqus.f90 b/utils/Cubit_or_Gmsh/old_check_mesh_quality_CUBIT_Abaqus.f90
index edc6ac232..641ced048 100644
--- a/utils/Cubit_or_Gmsh/old_check_mesh_quality_CUBIT_Abaqus.f90
+++ b/utils/Cubit_or_Gmsh/old_check_mesh_quality_CUBIT_Abaqus.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/Visualization/Paraview/create_slice_VTK.f90 b/utils/Visualization/Paraview/create_slice_VTK.f90
index a23287bd6..fbf1246ef 100644
--- a/utils/Visualization/Paraview/create_slice_VTK.f90
+++ b/utils/Visualization/Paraview/create_slice_VTK.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/Visualization/Paraview/visualize_gold/src/visualize.f90 b/utils/Visualization/Paraview/visualize_gold/src/visualize.f90
index 81421637a..2dbaf38f2 100644
--- a/utils/Visualization/Paraview/visualize_gold/src/visualize.f90
+++ b/utils/Visualization/Paraview/visualize_gold/src/visualize.f90
@@ -9,7 +9,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/Visualization/Paraview/visualize_gold/src/visualize_collect.f90 b/utils/Visualization/Paraview/visualize_gold/src/visualize_collect.f90
index c0ff1c907..8fe5cfa58 100644
--- a/utils/Visualization/Paraview/visualize_gold/src/visualize_collect.f90
+++ b/utils/Visualization/Paraview/visualize_gold/src/visualize_collect.f90
@@ -9,7 +9,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/Visualization/Paraview/visualize_gold/src/visualize_par.f90 b/utils/Visualization/Paraview/visualize_gold/src/visualize_par.f90
index debbe3301..018e065e1 100644
--- a/utils/Visualization/Paraview/visualize_gold/src/visualize_par.f90
+++ b/utils/Visualization/Paraview/visualize_gold/src/visualize_par.f90
@@ -9,7 +9,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/Visualization/Paraview/visualize_gold/src/write_ensight.f90 b/utils/Visualization/Paraview/visualize_gold/src/write_ensight.f90
index aa1406f50..90d32b8d0 100644
--- a/utils/Visualization/Paraview/visualize_gold/src/write_ensight.f90
+++ b/utils/Visualization/Paraview/visualize_gold/src/write_ensight.f90
@@ -9,7 +9,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/clean_listings_specfem.pl b/utils/clean_listings_specfem.pl
index 9799ab78c..97c41acd1 100755
--- a/utils/clean_listings_specfem.pl
+++ b/utils/clean_listings_specfem.pl
@@ -189,6 +189,9 @@
       $line =~ s#hessian#Hessian#ogi;
       $line =~ s#cartesian#Cartesian#ogi;
 
+# convert the GNU license from version 2+ to version 3 (we switched in June 2017)
+      $line =~ s#either version 2 of the License#either version 3 of the License#ogi;
+
 # for spaces around comparisons we exclude that file because it contains print statements that print
 # XML file lines and thus it contains many < and > characters that must not be changed
       if($basename_obtained ne 'write_output_ASDF.f90') {
diff --git a/utils/locate_partition.f90 b/utils/locate_partition.f90
index 14386748c..a662621ce 100644
--- a/utils/locate_partition.f90
+++ b/utils/locate_partition.f90
@@ -10,7 +10,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_missing_nodes.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_missing_nodes.f90
index 65c6fceb0..fdf9bca38 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_missing_nodes.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_missing_nodes.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_topography.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_topography.f90
index c0923416a..d23c347a0 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_topography.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_topography.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_topography_410_650.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_topography_410_650.f90
index fdbd88782..0cea9d73e 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_topography_410_650.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_topography_410_650.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_topography_cmb.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_topography_cmb.f90
index 7c9b35336..224e7b13c 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_topography_cmb.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_topography_cmb.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_topography_icb.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_topography_icb.f90
index 1dd6f7dc5..836eab379 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_topography_icb.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/add_topography_icb.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/anisotropic_inner_core_model.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/anisotropic_inner_core_model.f90
index 4e000405b..85f8a6244 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/anisotropic_inner_core_model.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/anisotropic_inner_core_model.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/anisotropic_mantle_model.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/anisotropic_mantle_model.f90
index b17336a67..cbf38e174 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/anisotropic_mantle_model.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/anisotropic_mantle_model.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/auto_ner.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/auto_ner.f90
index 804200855..2c453af49 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/auto_ner.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/auto_ner.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/calc_jacobian.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/calc_jacobian.f90
index b4e21cb26..aeff8c4fd 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/calc_jacobian.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/calc_jacobian.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/combine_AVS_DX.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/combine_AVS_DX.f90
index 855b85309..e76b8acdc 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/combine_AVS_DX.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/combine_AVS_DX.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/comp_source_spectrum.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/comp_source_spectrum.f90
index c9df16f6f..2d72a0c7e 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/comp_source_spectrum.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/comp_source_spectrum.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/comp_source_time_function.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/comp_source_time_function.f90
index 513f4b6b1..60773d4c6 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/comp_source_time_function.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/comp_source_time_function.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/compute_coordinates_grid.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/compute_coordinates_grid.f90
index b95079970..b7428ec03 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/compute_coordinates_grid.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/compute_coordinates_grid.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/compute_element_properties.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/compute_element_properties.f90
index 8923ee832..68389b3d9 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/compute_element_properties.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/compute_element_properties.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/count_number_of_sources.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/count_number_of_sources.f90
index b04a2458e..d27c037ff 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/count_number_of_sources.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/count_number_of_sources.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/create_header_file.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/create_header_file.f90
index 5ef8d090e..383a60904 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/create_header_file.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/create_header_file.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/create_name_database.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/create_name_database.f90
index c2ba9a72a..da0482c28 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/create_name_database.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/create_name_database.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/create_regions_mesh.F90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/create_regions_mesh.F90
index 1639d21a9..269edea67 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/create_regions_mesh.F90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/create_regions_mesh.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/create_serial_name_database.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/create_serial_name_database.f90
index 8cb6b14ac..7252420d5 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/create_serial_name_database.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/create_serial_name_database.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/crustal_model.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/crustal_model.f90
index 671ba021a..c3cb5df54 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/crustal_model.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/crustal_model.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/define_derivation_matrices.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/define_derivation_matrices.f90
index 6c7e411fe..9802847dc 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/define_derivation_matrices.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/define_derivation_matrices.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/define_superbrick.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/define_superbrick.f90
index 0075e546c..9eff67412 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/define_superbrick.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/define_superbrick.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/euler_angles.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/euler_angles.f90
index 4e5a1a6ad..2a91438bb 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/euler_angles.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/euler_angles.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/exit_mpi.F90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/exit_mpi.F90
index a377e340f..809bf808b 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/exit_mpi.F90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/exit_mpi.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_MPI_1D_buffers.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_MPI_1D_buffers.f90
index 9b63d2cd0..67ebf196c 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_MPI_1D_buffers.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_MPI_1D_buffers.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_MPI_cutplanes_eta.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_MPI_cutplanes_eta.f90
index 31131d202..e74eaaf6c 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_MPI_cutplanes_eta.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_MPI_cutplanes_eta.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_MPI_cutplanes_xi.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_MPI_cutplanes_xi.f90
index dc0acf027..9e1c459b4 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_MPI_cutplanes_xi.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_MPI_cutplanes_xi.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_absorb.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_absorb.f90
index 1b7a01966..94ba58bdb 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_absorb.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_absorb.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_backazimuth.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_backazimuth.f90
index 133600f35..4dfa8c6d7 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_backazimuth.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_backazimuth.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_cmt.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_cmt.f90
index 7cbd693c4..d2f51dab6 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_cmt.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_cmt.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_ellipticity.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_ellipticity.f90
index d6b1b3743..504469e73 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_ellipticity.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_ellipticity.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_global.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_global.f90
index 83d5cc47c..6933a514a 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_global.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_global.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_jacobian_boundaries.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_jacobian_boundaries.f90
index bd83e4572..8db4bc0e5 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_jacobian_boundaries.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_jacobian_boundaries.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_jacobian_discontinuities.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_jacobian_discontinuities.f90
index 900625781..f2aa70c2b 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_jacobian_discontinuities.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_jacobian_discontinuities.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_model.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_model.f90
index 45147de17..5aa1f7543 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_model.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_model.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_shape2D.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_shape2D.f90
index c1aaf3168..a89f619f9 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_shape2D.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_shape2D.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_shape3D.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_shape3D.f90
index 32a93c33b..3e33062af 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_shape3D.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_shape3D.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_value_parameters.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_value_parameters.f90
index b89ddf2c1..f41ee6432 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_value_parameters.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/get_value_parameters.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/hex_nodes.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/hex_nodes.f90
index 69f4d9ba8..069d7eff5 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/hex_nodes.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/hex_nodes.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/intgrl.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/intgrl.f90
index a520f7c4f..2ffbf4df8 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/intgrl.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/intgrl.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/jp3d1994_model.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/jp3d1994_model.f90
index 49ca8ccc8..15ee7ac6b 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/jp3d1994_model.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/jp3d1994_model.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/lagrange_poly.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/lagrange_poly.f90
index 5e2bd7ad3..def2e4cea 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/lagrange_poly.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/lagrange_poly.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/lgndr.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/lgndr.f90
index 592ce10e1..cb9a4a4ff 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/lgndr.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/lgndr.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/make_ellipticity.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/make_ellipticity.f90
index 6a668cbf5..710d60957 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/make_ellipticity.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/make_ellipticity.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/make_gravity.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/make_gravity.f90
index da781c50d..3672bf252 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/make_gravity.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/make_gravity.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/mantle_model.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/mantle_model.f90
index 727f45c36..258547c05 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/mantle_model.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/mantle_model.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/memory_eval.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/memory_eval.f90
index 77609726a..abf0297fe 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/memory_eval.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/memory_eval.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/meshfem3D.F90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/meshfem3D.F90
index 94e6ab140..ab22eb232 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/meshfem3D.F90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/meshfem3D.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_1066a.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_1066a.f90
index 5aed4599a..9cbad327a 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_1066a.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_1066a.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_ak135.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_ak135.f90
index 2f6ffe724..328df549b 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_ak135.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_ak135.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_iasp91.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_iasp91.f90
index de2826680..076df3375 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_iasp91.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_iasp91.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_jp1d.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_jp1d.f90
index aff600cff..306fc75df 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_jp1d.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_jp1d.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_prem.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_prem.f90
index d047c4b9c..18c67c671 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_prem.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_prem.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_ref.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_ref.f90
index c4d188891..525d222da 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_ref.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_ref.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_sea1d.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_sea1d.f90
index 5cfaad1f9..310725d7c 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_sea1d.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/model_sea1d.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/moho_stretching.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/moho_stretching.f90
index 677652294..1aa2a7e09 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/moho_stretching.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/moho_stretching.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/read_compute_parameters.F90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/read_compute_parameters.F90
index 9fb8fb4f4..7bec53db4 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/read_compute_parameters.F90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/read_compute_parameters.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/read_value_parameters.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/read_value_parameters.f90
index c774144af..1812be58f 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/read_value_parameters.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/read_value_parameters.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/recompute_jacobian.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/recompute_jacobian.f90
index 939d36cb5..f8103c470 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/recompute_jacobian.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/recompute_jacobian.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/reduce.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/reduce.f90
index 3552e599a..700ea145d 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/reduce.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/reduce.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/rthetaphi_xyz.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/rthetaphi_xyz.f90
index 10aaa9afb..d0229f32f 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/rthetaphi_xyz.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/rthetaphi_xyz.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/save_arrays_solver.F90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/save_arrays_solver.F90
index a1082f1b2..ab1339588 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/save_arrays_solver.F90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/save_arrays_solver.F90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/save_header_file.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/save_header_file.f90
index 8ccc841f3..8aaf8fa55 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/save_header_file.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/save_header_file.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/sea99_s_model.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/sea99_s_model.f90
index 84c9a994e..b7c954e45 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/sea99_s_model.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/sea99_s_model.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/sort_array_coordinates.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/sort_array_coordinates.f90
index 1cd89246b..1161e18bb 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/sort_array_coordinates.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/sort_array_coordinates.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/spline_routines.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/spline_routines.f90
index edf6d97a5..be3164326 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/spline_routines.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/spline_routines.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/stretching_function.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/stretching_function.f90
index a41c5fb24..70f44dc62 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/stretching_function.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/stretching_function.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/topo_bathy.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/topo_bathy.f90
index 2602bb1b4..8e2fc8171 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/topo_bathy.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/topo_bathy.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/write_AVS_DX_global_chunks_data.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/write_AVS_DX_global_chunks_data.f90
index 978b9e42d..d178fa1e3 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/write_AVS_DX_global_chunks_data.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/write_AVS_DX_global_chunks_data.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/write_AVS_DX_global_data.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/write_AVS_DX_global_data.f90
index a66587247..c42d4c15f 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/write_AVS_DX_global_data.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/write_AVS_DX_global_data.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/write_AVS_DX_global_faces_data.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/write_AVS_DX_global_faces_data.f90
index 323430d1c..0b4cae9ce 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/write_AVS_DX_global_faces_data.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/write_AVS_DX_global_faces_data.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/write_AVS_DX_surface_data.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/write_AVS_DX_surface_data.f90
index 1a6c028a0..7e5f7f940 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/write_AVS_DX_surface_data.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/mesher_for_serial/write_AVS_DX_surface_data.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/older_serial_specfem3D_inlined_v03_is_the_fastest_with_function_calls.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/older_serial_specfem3D_inlined_v03_is_the_fastest_with_function_calls.f90
index e05b98040..05dbce5f0 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/older_serial_specfem3D_inlined_v03_is_the_fastest_with_function_calls.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/older_serial_specfem3D_inlined_v03_is_the_fastest_with_function_calls.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_22dec2008_NGLOB.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_22dec2008_NGLOB.f90
index 11951d5ea..7b0bc7181 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_22dec2008_NGLOB.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_22dec2008_NGLOB.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_22dec2008_NSPEC.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_22dec2008_NSPEC.f90
index df0ebe181..4224898cf 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_22dec2008_NSPEC.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_22dec2008_NSPEC.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v01.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v01.f90
index ab1afcde6..a0bfcd40c 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v01.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v01.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v02.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v02.f90
index c36a06447..bcffc5045 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v02.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v02.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v04_is_slower.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v04_is_slower.f90
index 87700b6d6..b9d4f53b8 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v04_is_slower.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v04_is_slower.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v05_displx_y_z_3arrays.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v05_displx_y_z_3arrays.f90
index bd12b0c59..b9696040f 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v05_displx_y_z_3arrays.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v05_displx_y_z_3arrays.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v06_fac1_merged_not_faster.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v06_fac1_merged_not_faster.f90
index 4dd76df94..93554f3ea 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v06_fac1_merged_not_faster.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/older_slower_versions_not_so_good_do_not_use/serial_specfem3D_26dec2008_inlined_v06_fac1_merged_not_faster.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/read_arrays_solver.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/read_arrays_solver.f90
index 1495ce54d..98b7ce9cc 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/read_arrays_solver.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/read_arrays_solver.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/specfem3D_fastest_version_with_Deville_and_inlining.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/specfem3D_fastest_version_with_Deville_and_inlining.f90
index 1f27eb7f9..7146d912a 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/specfem3D_fastest_version_with_Deville_and_inlining.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/specfem3D_fastest_version_with_Deville_and_inlining.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/specfem3D_how_to_consistently_average_a_gradient.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/specfem3D_how_to_consistently_average_a_gradient.f90
index 5f173e156..268a42619 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/specfem3D_how_to_consistently_average_a_gradient.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/specfem3D_how_to_consistently_average_a_gradient.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/specfem3D_normal_no_Deville.f90 b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/specfem3D_normal_no_Deville.f90
index fd9238fed..bf4b8352b 100644
--- a/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/specfem3D_normal_no_Deville.f90
+++ b/utils/small_SEM_solvers_in_Fortran_and_C_without_MPI_to_learn/specfem3D_normal_no_Deville.f90
@@ -11,7 +11,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/unused_routines/create_movie_GMT/compute_parameters.f90 b/utils/unused_routines/create_movie_GMT/compute_parameters.f90
index 205e8451b..f1ec89ee6 100644
--- a/utils/unused_routines/create_movie_GMT/compute_parameters.f90
+++ b/utils/unused_routines/create_movie_GMT/compute_parameters.f90
@@ -9,7 +9,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/unused_routines/create_movie_GMT/get_value_parameters.f90 b/utils/unused_routines/create_movie_GMT/get_value_parameters.f90
index 9d609d0b2..503187de5 100644
--- a/utils/unused_routines/create_movie_GMT/get_value_parameters.f90
+++ b/utils/unused_routines/create_movie_GMT/get_value_parameters.f90
@@ -9,7 +9,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/unused_routines/create_movie_GMT/read_parameter_file.f90 b/utils/unused_routines/create_movie_GMT/read_parameter_file.f90
index fad4eb10a..23aceb37d 100644
--- a/utils/unused_routines/create_movie_GMT/read_parameter_file.f90
+++ b/utils/unused_routines/create_movie_GMT/read_parameter_file.f90
@@ -9,7 +9,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/unused_routines/create_movie_GMT/read_value_parameters.f90 b/utils/unused_routines/create_movie_GMT/read_value_parameters.f90
index be96f381c..d1908561d 100644
--- a/utils/unused_routines/create_movie_GMT/read_value_parameters.f90
+++ b/utils/unused_routines/create_movie_GMT/read_value_parameters.f90
@@ -9,7 +9,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/unused_routines/define_subregions.f90 b/utils/unused_routines/define_subregions.f90
index bbab54a79..541aff572 100644
--- a/utils/unused_routines/define_subregions.f90
+++ b/utils/unused_routines/define_subregions.f90
@@ -10,7 +10,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/unused_routines/define_subregions_heuristic.f90 b/utils/unused_routines/define_subregions_heuristic.f90
index 6300a03d7..6512a122e 100644
--- a/utils/unused_routines/define_subregions_heuristic.f90
+++ b/utils/unused_routines/define_subregions_heuristic.f90
@@ -10,7 +10,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/unused_routines/hauksson_model.f90 b/utils/unused_routines/hauksson_model.f90
index 6a9acc22a..dd12cce81 100644
--- a/utils/unused_routines/hauksson_model.f90
+++ b/utils/unused_routines/hauksson_model.f90
@@ -10,7 +10,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/unused_routines/mesh_vertical.f90 b/utils/unused_routines/mesh_vertical.f90
index 97a4ca759..351d5ad8f 100644
--- a/utils/unused_routines/mesh_vertical.f90
+++ b/utils/unused_routines/mesh_vertical.f90
@@ -10,7 +10,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/unused_routines/model_interface_bedrock.f90 b/utils/unused_routines/model_interface_bedrock.f90
index 2e76a65b4..67be74fbc 100644
--- a/utils/unused_routines/model_interface_bedrock.f90
+++ b/utils/unused_routines/model_interface_bedrock.f90
@@ -10,7 +10,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/unused_routines/opendx_AVS/combine_AVS_DX.f90 b/utils/unused_routines/opendx_AVS/combine_AVS_DX.f90
index d0790af88..5b569e1d0 100644
--- a/utils/unused_routines/opendx_AVS/combine_AVS_DX.f90
+++ b/utils/unused_routines/opendx_AVS/combine_AVS_DX.f90
@@ -10,7 +10,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/unused_routines/opendx_AVS/create_highres_shakemaps_AVS_DX.f90 b/utils/unused_routines/opendx_AVS/create_highres_shakemaps_AVS_DX.f90
index 18d009a34..b7b668d06 100644
--- a/utils/unused_routines/opendx_AVS/create_highres_shakemaps_AVS_DX.f90
+++ b/utils/unused_routines/opendx_AVS/create_highres_shakemaps_AVS_DX.f90
@@ -9,7 +9,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/unused_routines/opendx_AVS/extract_shakemap_GMT.f90 b/utils/unused_routines/opendx_AVS/extract_shakemap_GMT.f90
index 168f876e1..a883639ac 100644
--- a/utils/unused_routines/opendx_AVS/extract_shakemap_GMT.f90
+++ b/utils/unused_routines/opendx_AVS/extract_shakemap_GMT.f90
@@ -9,7 +9,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/unused_routines/read_moho_map.f90 b/utils/unused_routines/read_moho_map.f90
index f616246bb..97aad8115 100644
--- a/utils/unused_routines/read_moho_map.f90
+++ b/utils/unused_routines/read_moho_map.f90
@@ -10,7 +10,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/unused_routines/salton_trough_gocad.f90 b/utils/unused_routines/salton_trough_gocad.f90
index c08d8e980..e84341554 100644
--- a/utils/unused_routines/salton_trough_gocad.f90
+++ b/utils/unused_routines/salton_trough_gocad.f90
@@ -10,7 +10,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,
diff --git a/utils/unused_routines/socal_model.f90 b/utils/unused_routines/socal_model.f90
index 1a0578d60..3b6c20a3b 100644
--- a/utils/unused_routines/socal_model.f90
+++ b/utils/unused_routines/socal_model.f90
@@ -10,7 +10,7 @@
 !
 ! This program is free software; you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
-! the Free Software Foundation; either version 2 of the License, or
+! the Free Software Foundation; either version 3 of the License, or
 ! (at your option) any later version.
 !
 ! This program is distributed in the hope that it will be useful,