M. Banko, und E. Brill. ACL '01: Proceedings of the 39th Annual Meeting on Association for Computational Linguistics, Seite 26--33. Morristown, NJ, USA, Association for Computational Linguistics, (2001)
D. Lin. Proceedings of the 17th international conference on Computational linguistics, Seite 768--774. Morristown, NJ, USA, Association for Computational Linguistics, (1998)