@InProceedings{zheleva:kdd09,
  author       = "Zheleva, Elena and Sharara, Hossam and Getoor, Lise",
  title        = "Co-evolution of Social and Affiliation Networks",
  booktitle    = "15th ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD)",
  month        = "June",
  year         = "2009",
}