3-NIRVANA-user-guide/3.1-Code-basics.md

@@ -32,13 +32,13 @@ It implements the following physics system:
 
 The physical processes and their underlying equations are described in
 more detail in the physics guide
-([PDF](https://gitlab.aip.de/ziegler/NIRVANA/doc/pdf/PhysicsGuide.pdf)).
+([PDF](https://gitlab.aip.de/ziegler/NIRVANA/-/tree/master/doc/pdf/PhysicsGuide.pdf)).
 
 The multi-species advection framework is complemented by the NIRVANA
 Chemistry&Cooling Model (NCCM) – a comprehensive network of chemical
 reactions and microphysical processes designed to model the interstellar
 medium (ISM). The NCCM is described in the chemistry guide
-([PDF](https://gitlab.aip.de/ziegler/NIRVANA/doc/pdf/ChemistryGuide.pdf)).
+([PDF](https://gitlab.aip.de/ziegler/NIRVANA/-/tree/master/doc/pdf/ChemistryGuide.pdf)).
 
 In full generality the multi-physics, multi-species system is governed
 by hyperbolic-parabolic-elliptic Partial Differential Equations (PDE)
@@ -48,7 +48,7 @@ NCCM. This highly complex system demands for robust numerical schemes
 and time integrators for the different mathematical parts of the
 equations. The numerical methods applied in the NIRVANA code are
 documented in the numerics guide
-([PDF](https://gitlab.aip.de/ziegler/NIRVANA/doc/pdf/NumericsGuide.pdf)).
+([PDF](https://gitlab.aip.de/ziegler/NIRVANA/-/tree/master/doc/pdf/NumericsGuide.pdf)).
 
 #### Coordinate systems