[BFG98] K. Bennett, U. Fayyad, D. Geiger: Density-Based Indexing for Approximate (2008)
Usama Fayyad, Surajit Chaudhuri, Paul Bradley, Aggr R. Agrawal, J. Gehrke, D. Gunopulos, ...
[BF98] P. Bradley, U. Fayyad: Refining Initial Points for K-Means Clustering, ICML