Update README.md

Author: torms3

README.md

@@ -1,2 +1,17 @@
 # DeepEM
 Deep Learning for EM Connectomics
+
+## Citation
+[Lee et al. 2017](https://arxiv.org/abs/1706.00120)
+```
+@article{lee2017superhuman,
+  author    = {Kisuk Lee and
+               Jonathan Zung and
+               Peter Li and
+               Viren Jain and
+               H. Sebastian Seung},
+  title     = {Superhuman Accuracy on the {SNEMI3D} Connectomics Challenge},
+  journal   = {arXiv preprint arXiv:1706.00120},
+  year      = {2017},
+}
+```