Efficient Biased Sampling for Approximate Clustering and Outlier Detection in Large Data Sets.

George Kollios Dimitrios Gunopulos Nick Koudas Stefan Berchtold Efficient Biased Sampling for Approximate Clustering and Outlier Detection in Large Data Sets. 1170-1187 2003 15 IEEE Trans. Knowl. Data Eng. 5 http://csdl.computer.org/comp/trans/tk/2003/05/k1170abs.htm db/journals/tkde/tkde15.html#KolliosGKB03