K. Beyer, J. Goldstein, R. Ramakrishnan, and U. Shaft. Proceeding of the 7th International Conference on Database Theory, volume 1540 of Lecture Notes in Computer Science, page 217-235. Springer, (1999)
M. Sahami, M. Hearst, and E. Saund. Machine Learning, Proceedings of the Thirteenth International Conference (ICML '96), page 435-443. Morgan Kaufmann, (1996)
M. Hu, and B. Liu. KDD '04: Proceedings of the tenth ACM SIGKDD international conference on Knowledge discovery and data mining, page 168--177. New York, NY, USA, ACM, (2004)
W. Cavnar, and J. Trenkle. Proceedings of SDAIR-94, 3rd Annual Symposium on Document Analysis and Information Retrieval, page 161--175. Las Vegas, US, (1994)