M. Hearst. Proceedings of the 37th annual meeting of the Association for Computational
Linguistics on Computational Linguistics, page 3--10. Morristown, NJ, USA, Association for Computational Linguistics, (1999)
R. Feldman, and I. Dagan. Proceedings of the First International Conference on Knowledge Discovery (KDD '1996), August 20-21, Montreal, Quebec, Canada, page 112--117. AAAI Press, (1995)
S. Bloehdorn, P. Cimiano, A. Hotho, and S. Staab. LDV Forum - GLDV Journal for Computational Linguistics and Language Technology, 20 (1):
87-112(May 2005)