@inproceedings{Yangkdd09,
  author    = {Tianbao Yang and
               Rong Jin and
               Yun Chi and
               Shenghuo Zhu},
  title     = {Combining link and content for community detection: a discriminative
               approach},
  booktitle = {KDD},
  year      = {2009},
  pages     = {927-936}
  }