Update README.md

python_scripts/README.md

-# aaa 
+# Constrained simulation scripts in python 
 
-## vvv
+## Citing
 
-... 
+If you use the constrained simulation for a publication, use the following citation:
 
+@article{dimitrov2017a,
+  author = {Dimitrov, Nikolay Krasimirov and Natarajan, Anand},
+  title = {Application of simulated lidar scanning patterns to constrained Gaussian turbulence fields for load validation},
+  language = {eng},
+  format = {article},
+  journal = {Wind Energy},
+  volume = {20},
+  number = {1},
+  pages = {79-95},
+  year = {2017},
+  issn = {10991824, 10954244},
+  publisher = {John Wiley and Sons Ltd},
+  doi = {10.1002/we.1992}
+}