P. Berkhin, J. Beche, and D. Randall. Proceedings of the seventh ACM SIGKDD international conference on Knowledge discovery and data mining, page 414--419. ACM, (2001)
I. Cadez, D. Heckerman, C. Meek, P. Smyth, and S. White. Proceedings of the Sixth ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, page 280--284. New York, NY, USA, ACM, (2000)