update pointer to citation

README.md

@@ -1,5 +1,28 @@
 # Malware Env for OpenAI Gym
 **************************
+Citing
+======
+
+If you use this code in a publication please cite the following [paper](https://arxiv.org/abs/1801.08917):
+
+```
+
+Hyrum S. Anderson, Anant Kharkar, Bobby Filar, David Evans, Phil Roth, "Learning to Evade Static PE Machine Learning Malware Models via Reinforcement Learning", in ArXiv e-prints. Jan. 2018.
+
+@ARTICLE{anderson2018learning,
+  author={Anderson, Hyrum S and Kharkar, Anant and Filar, Bobby and Evans, David and Roth, Phil},
+  title={Learning to Evade Static PE Machine Learning Malware Models via Reinforcement Learning},
+  journal={arXiv preprint arXiv:1801.08917},
+  archivePrefix = "arXiv",
+  eprint = {1801.08917},
+  primaryClass = "cs.CR",
+  keywords = {Computer Science - Cryptography and Security},
+  year = 2018,
+  month = jan,
+  adsurl = {http://adsabs.harvard.edu/abs/2018arXiv180108917A},
+}
+```
+
 
 **This is a malware manipulation environment for OpenAI's ``gym``.** 
 [OpenAI Gym](https://gym.openai.com/) is a toolkit for developing and comparing reinforcement