@article{Yangml11,
  author    = {Tianbao Yang and
               Yun Chi and
               Shenghuo Zhu and
               Yihong Gong and
               Rong Jin},
  title     = {Detecting communities and their evolutions in dynamic social
               networks - a Bayesian approach},
  journal   = {Machine Learning},
  volume    = {82},
  number    = {2},
  year      = {2011},
  pages     = {157-189}
  }