Update README.md

Author: marc-vuffray

README.md

@@ -36,6 +36,17 @@ If you find GraphicalModelLearning useful in your work, we kindly request that y
     doi = {10.1126/sciadv.1700791},
     URL = {http://advances.sciencemag.org/content/4/3/e1700791}
 }
+
+@incollection{NIPS2016_6375,
+    author = {Vuffray, Marc and Misra, Sidhant and Lokhov, Andrey Y. and Chertkov, Michael},
+    title = {Interaction Screening: Efficient and Sample-Optimal Learning of Ising Models},
+    booktitle = {Advances in Neural Information Processing Systems 29},
+    pages = {2595--2603},
+    year = {2016},
+    publisher = {Curran Associates, Inc.},
+    url = {http://papers.nips.cc/paper/6375-interaction-screening-efficient-and-sample-optimal-learning-of-ising-models.pdf}
+}
+
 ```