T. Joachims. Proceedings of ICML-99, 16th International Conference on Machine Learning, page 200--209. Bled, SL, Morgan Kaufmann Publishers, San Francisco, US, (1999)
B. Pang, L. Lee, and S. Vaithyanathan. EMNLP '02: Proceedings of the ACL-02 conference on Empirical methods in natural language processing, page 79--86. Morristown, NJ, USA, Association for Computational Linguistics, (2002)
P. Turney. ACL '02: Proceedings of the 40th Annual Meeting on Association for Computational Linguistics, page 417--424. Morristown, NJ, USA, Association for Computational Linguistics, (2002)