Hirsch, D., Markström, I., Patterson, M. L., Sandberg, A., & Vejdemo-Johansson, M. (2015). More ties than we thought. PeerJ Computer Science, 1, e2. http://arxiv.org/abs/1401.8242 Posted on 16 December 201516 December 2015 Posted in Uncategorised. Share on Facebook | Share on Twitter