Paper: Ester, Martin, Hans-Peter Kriegel, Jörg Sander, and Xiaowei Xu. "A density-based algorithm for discovering clusters in large spatial databases with noise." In Kdd, vol. 96, no. 34, pp. 226-231. 1996.
Mohsen Jamali and Professor Martin Ester won the best-paper award at the ACM Conference on Recommender Systems, 2010.