G. Forman, and E. Kirshenbaum. CIKM '08: Proceeding of the 17th ACM conference on Information and knowledge management, page 1221--1230. New York, NY, USA, ACM, (2008)
D. Lin. Proceedings of the 17th international conference on Computational linguistics, page 768--774. Morristown, NJ, USA, Association for Computational Linguistics, (1998)
M. Banko, and E. Brill. ACL '01: Proceedings of the 39th Annual Meeting on Association for Computational Linguistics, page 26--33. Morristown, NJ, USA, Association for Computational Linguistics, (2001)