diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 8caf71b..0c6a348 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,104 +1,105 @@
 # required to specify the c++ standard
 cmake_minimum_required(VERSION 3.0)
 
 # define project information
 project(GooseFEM)
 
 # automatically parse the version number
 file(READ "${CMAKE_CURRENT_SOURCE_DIR}/GooseFEM/Macros.h" _goosefem_version_header)
 string(REGEX MATCH "define[ \t]+GOOSEFEM_WORLD_VERSION[ \t]+([0-9]+)" _goosefem_world_version_match "${_goosefem_version_header}")
 set(GOOSEFEM_WORLD_VERSION "${CMAKE_MATCH_1}")
 string(REGEX MATCH "define[ \t]+GOOSEFEM_MAJOR_VERSION[ \t]+([0-9]+)" _goosefem_major_version_match "${_goosefem_version_header}")
 set(GOOSEFEM_MAJOR_VERSION "${CMAKE_MATCH_1}")
 string(REGEX MATCH "define[ \t]+GOOSEFEM_MINOR_VERSION[ \t]+([0-9]+)" _goosefem_minor_version_match "${_goosefem_version_header}")
 set(GOOSEFEM_MINOR_VERSION "${CMAKE_MATCH_1}")
 set(GOOSEFEM_VERSION_NUMBER ${GOOSEFEM_WORLD_VERSION}.${GOOSEFEM_MAJOR_VERSION}.${GOOSEFEM_MINOR_VERSION})
 
 # required for install
 include(CMakePackageConfigHelpers)
 include(GNUInstallDirs)
 
 # set c++ standard -> c++14
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 if(NOT CMAKE_CXX_STANDARD OR CMAKE_CXX_STANDARD LESS 14)
   set(CMAKE_CXX_STANDARD 14)
 endif()
 
 # set paths where 'GooseFEM' will be installed
 # - root
 set(GOOSEFEM_ROOT_DIR ${CMAKE_INSTALL_PREFIX})
 # - headers
 set(GOOSEFEM_INCLUDE_DIR "${CMAKE_INSTALL_PREFIX}/${INCLUDE_INSTALL_DIR}")
 # - headers
 set(INCLUDE_INSTALL_DIR
   "${CMAKE_INSTALL_INCLUDEDIR}/GooseFEM"
   CACHE PATH "Path, relative to CMAKE_PREFIX_PATH, where the GooseFEM header files are installed"
 )
 # - CMake configuration
 set(CMAKEPACKAGE_INSTALL_DIR
   "${CMAKE_INSTALL_DATADIR}/GooseFEM"
   CACHE PATH "Path where GooseFEMConfig.cmake is installed"
 )
 # - pkg-config
 set(PKGCONFIG_INSTALL_DIR
   "${CMAKE_INSTALL_DATADIR}/pkgconfig"
   CACHE PATH "Path where GooseFEM.pc is installed"
 )
 
 # list all header files
 set(GOOSEFEM_HEADERS
+  GooseFEM/DynamicsDiagonalLinearStrainQuad4.h
+  GooseFEM/DynamicsDiagonalPeriodic.h
   GooseFEM/GooseFEM.h
   GooseFEM/Macros.h
-  GooseFEM/DynamicsPeriodicDiagonal.h
   GooseFEM/Mesh.h
   GooseFEM/MeshQuad4.h
   GooseFEM/MeshTri3.h
 )
 
 # Disable pkg-config for native Windows builds
 if(NOT WIN32 OR NOT CMAKE_HOST_SYSTEM_NAME MATCHES Windows)
   option(GOOSEFEM_BUILD_PKGCONFIG "Build pkg-config .pc file for GooseFEM" ON)
 endif()
 
 # build pkg-config file -> fill in relevant values
 if(GOOSEFEM_BUILD_PKGCONFIG)
   configure_file(GooseFEM.pc.in GooseFEM.pc @ONLY)
   install(FILES ${CMAKE_CURRENT_BINARY_DIR}/GooseFEM.pc DESTINATION ${PKGCONFIG_INSTALL_DIR})
 endif()
 
 # configure CMake file
 configure_package_config_file(
   ${CMAKE_CURRENT_SOURCE_DIR}/GooseFEMConfig.cmake.in
   ${CMAKE_CURRENT_BINARY_DIR}/GooseFEMConfig.cmake
   PATH_VARS GOOSEFEM_INCLUDE_DIR GOOSEFEM_ROOT_DIR
   INSTALL_DESTINATION ${CMAKEPACKAGE_INSTALL_DIR}
   NO_CHECK_REQUIRED_COMPONENTS_MACRO
 )
 
 # install
 # - CMake-file
 install(FILES
   ${CMAKE_CURRENT_BINARY_DIR}/GooseFEMConfig.cmake
   DESTINATION
   ${CMAKEPACKAGE_INSTALL_DIR}
 )
 # - headers
 install(FILES
   ${CMAKE_CURRENT_SOURCE_DIR}/${GOOSEFEM_HEADERS}
   DESTINATION
   ${INCLUDE_INSTALL_DIR}/GooseFEM
 )
 
 # print information to screen
 message(STATUS "")
 message(STATUS "+-------------------------------------------------------------------------------")
 message(STATUS "|")
 message(STATUS "| Use 'make install' to install in '${CMAKE_INSTALL_PREFIX}'")
 message(STATUS "| To specify a custom directory call")
 message(STATUS "|   cmake . -DCMAKE_INSTALL_PREFIX=yourprefix")
 message(STATUS "| For custom paths, add the following line to your '~/.bashrc'")
 message(STATUS "|   export PKG_CONFIG_PATH=${CMAKE_INSTALL_PREFIX}/share/pkgconfig:$PKG_CONFIG_PATH")
 message(STATUS "|")
 message(STATUS "+-------------------------------------------------------------------------------")
 message(STATUS "")
diff --git a/src/GooseFEM/DynamicsDiagonalQuad4.h b/src/GooseFEM/DynamicsDiagonalLinearStrainQuad4.h
similarity index 100%
rename from src/GooseFEM/DynamicsDiagonalQuad4.h
rename to src/GooseFEM/DynamicsDiagonalLinearStrainQuad4.h
diff --git a/src/GooseFEM/GooseFEM.h b/src/GooseFEM/GooseFEM.h
index 861e65c..a7938a7 100644
--- a/src/GooseFEM/GooseFEM.h
+++ b/src/GooseFEM/GooseFEM.h
@@ -1,19 +1,19 @@
 /* =================================================================================================
 
 (c - GPLv3) T.W.J. de Geus (Tom) | tom@geus.me | www.geus.me | github.com/tdegeus/GooseFEM
 
 ================================================================================================= */
 
 #ifndef GOOSEFEM_H
 #define GOOSEFEM_H
 
 #include "Macros.h"
 
 #include "DynamicsDiagonalPeriodic.h"
-#include "DynamicsDiagonalQuad4.h"
+#include "DynamicsDiagonalLinearStrainQuad4.h"
 
 #include "Mesh.h"
 #include "MeshTri3.h"
 #include "MeshQuad4.h"
 
 #endif
diff --git a/src/GooseFEM/Macros.h b/src/GooseFEM/Macros.h
index d618c0e..0f9abbe 100644
--- a/src/GooseFEM/Macros.h
+++ b/src/GooseFEM/Macros.h
@@ -1,57 +1,57 @@
 /* =================================================================================================
 
 (c - GPLv3) T.W.J. de Geus (Tom) | tom@geus.me | www.geus.me | github.com/tdegeus/GooseFEM
 
 ================================================================================================= */
 
 #ifndef GOOSEFEM_MACROS_H
 #define GOOSEFEM_MACROS_H
 
 #define _USE_MATH_DEFINES // to use "M_PI" from "math.h"
 
 #include <assert.h>
 #include <cstdlib>
 #include <vector>
 #include <string>
 #include <memory>
 #include <iostream>
 #include <iomanip>
 #include <math.h>
 
 #include <Eigen/Dense>
 
 #include <cppmat/tensor.h>
 #include <cppmat/tensor2.h>
 #include <cppmat/tensor3.h>
 
 // =================================================================================================
 
 #define GOOSEFEM_WORLD_VERSION 0
 #define GOOSEFEM_MAJOR_VERSION 0
-#define GOOSEFEM_MINOR_VERSION 1
+#define GOOSEFEM_MINOR_VERSION 2
 
 #define GOOSEFEM_VERSION_AT_LEAST(x,y,z) \
   (GOOSEFEM_WORLD_VERSION>x || (GOOSEFEM_WORLD_VERSION>=x && \
   (GOOSEFEM_MAJOR_VERSION>y || (GOOSEFEM_MAJOR_VERSION>=y && \
                                 GOOSEFEM_MINOR_VERSION>=z))))
 
 #define GOOSEFEM_VERSION(x,y,z) \
   (GOOSEFEM_WORLD_VERSION==x && \
    GOOSEFEM_MAJOR_VERSION==y && \
    GOOSEFEM_MINOR_VERSION==z)
 
 // =================================================================================================
 
 namespace GooseFEM {
 
 typedef Eigen::Matrix<double, Eigen::Dynamic, Eigen::Dynamic, Eigen::RowMajor> MatD;
 typedef Eigen::Matrix<size_t, Eigen::Dynamic, Eigen::Dynamic, Eigen::RowMajor> MatS;
 typedef Eigen::Matrix<double, Eigen::Dynamic,              1, Eigen::ColMajor> ColD;
 typedef Eigen::Matrix<size_t, Eigen::Dynamic,              1, Eigen::ColMajor> ColS;
 typedef Eigen::Matrix<int   , Eigen::Dynamic,              1, Eigen::ColMajor> ColI;
 
 // -------------------------------------------------------------------------------------------------
 
 }
 
 #endif