@inproceedings{Ester96,
  author = {Ester, M. and Kriegel, H.-P. and Sander, J. and Xu, X.},
  booktitle = {Proceedings of the 2nd international conference on Knowledge Discovery
    and Data mining (KDD'96)},
  interhash = {ba33e4d6b4e5b26bd9f543f26b7d250a},
  intrahash = {d8eaf1b18d5b09075d8bf65b9561bead},
  month = {August},
  pages = {226--231},
  publisher = {AAAI Press},
  title = {A density-based algorithm for discovering clusters in large spatial
    databases with noise},
  year = 1996
}