@article{coclusteringfordirectedgraphsthe,
  title = {Co-clustering for directed graphs: the Stochastic co-Blockmodel and spectral algorithm Di-Sim},
  author = {Karl Rohe and Tai Qin and Bin Yu},
  year = {2012},
  eprint = {1204.2296},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1204.2296v2},
}