links to source files added

docs.it4i/software/viz/insitu.md

@@ -15,7 +15,7 @@ The Catalyst library is part of the ParaView module. More about ParaView can be
 
 ## Usage
 
-All code concerning the simulator/adaptor is available to download from [here][code]. It is a package with the following files: CMakeLists.txt, FEAdaptor.h, FEAdaptor.cxx, FEDataStructures.h, FEDataStructures.cxx, FEDriver.cxx and feslicescript.py.
+All code concerning the simulator/adaptor is available to download from [here][code]. It is a package with the following files: [CMakeLists.txt][cmakelist_txt], [FEAdaptor.h][feadaptor_h], [FEAdaptor.cxx][feadaptor_cxx], [FEDataStructures.h][fedatastructures_h], [FEDataStructures.cxx][fedatastructures_cxx], [FEDriver.cxx][fedriver_cxx] and [feslicescript.py][feslicescript].
 
 After the download unpack the code by
 
@@ -154,3 +154,11 @@ In client-server mode of ParaView disconnect from the server in ParaView and clo
 [code]: insitu/insitu.tar.gz
 [paraview_it4i]: https://docs.it4i.cz/software/viz/paraview/
 [vnc_it4i]: https://docs.it4i.cz/general/accessing-the-clusters/graphical-user-interface/vnc/
+[cmakelist_txt]: insitu/CMakeList.txt
+[feadaptor_h]: insitu/FEAdaptor.h
+[feadaptor_cxx]: insitu/FEAdaptor.cxx
+[fedatastructures_h]: insitu/FEDataStructures.h
+[fedatastructures_cxx]: insitu/FEDataStructures.cxx
+[fedriver_cxx]: insitu/FEDriver.cxx
+[feslicescript]: insitu/feslicescript.py
+