@INPROCEEDINGS{becker11clustering,
  author    = "Richard A. Becker and Ramon Caceres and Karrie Hanson and Ji Meng Loh and Simon Urbanek and Alexander Varshavsky and Chris Volinsky",
  title     = "{Clustering Anonymized Mobile Call Detail Records to Find Usage Groups}",
  booktitle = "Proceedings of the First Workshop on Pervasive Urban Applications (PURBA 2011)",
  month     = "June",
  year      = {2011}
}