Update the readme to include more amdis papers

README.md

@@ -70,8 +70,28 @@ cmake --build build-cmake
 
 How to Cite AMDiS
 =================
-If you use AMDiS as part of your research and in publications, we kindly ask you to cite the source repository, including the release version that you are using, e.g.
+If you use AMDiS as part of your research and in publications, we kindly ask you to cite the publications, AMDiS is based on, and the source repository, including the release version that you are using, e.g.
 ```
+@article{VeyVoigt2007AMDiS,
+  author    = {Simon Vey and Axel Voigt},
+  journal   = {Computing and Visualization in Science},
+  title     = {{AMDiS}: {A}daptive {M}ulti{Di}mensional {S}imulations},
+  year      = {2007},
+  pages     = {57--67},
+  volume    = {10},
+  doi       = {10.1007/s00791-006-0048-3},
+}
+@article{WitkowskiEtAl2015SoftwareConcepts,
+  author    = {Thomas Witkowski and Siqi Ling and Simon Praetorius and Axel Voigt},
+  journal   = {Advances in Computational Mathematics},
+  title     = {Software concepts and numerical algorithms for a scalable adaptive
+               parallel finite element method},
+  year      = {2015},
+  number    = {6},
+  pages     = {1145--1177},
+  volume    = {41},
+  doi       = {10.1007/s10444-015-9405-4},
+}
 @misc{AMDiS:2.10,
   key    = {AMDiS},
   title  = {Adaptive Multi-Dimensional Simulations},