M. Ankerst, M. Ester, and H. Kriegel. Proceedings of the ACM SIGKDD international conference on knowledge discovery and data mining (KDD), page 179--188. New York, NY, USA, ACM, (2000)
M. Ankerst, C. Elsen, M. Ester, and H. Kriegel. KDD '99: Proceedings of the fifth ACM SIGKDD international conference on Knowledge discovery and data mining, page 392--396. New York, NY, USA, ACM, (1999)
M. Ankerst, M. Breunig, H. Kriegel, and J. Sander. International Conference on Management of Data and Symposium on Principles of Database Systems Philadelphia (SIGMOD/PODS 1999), PA, USA - May 31 - June 03, 1999, page 49-60. New York, NY, USA, ACM, (1999)