C. Lin. Proceedings of the 33rd annual meeting on Association for Computational Linguistics, стр. 308--310. Morristown, NJ, USA, Association for Computational Linguistics, (1995)
H. Yang, и J. Callan. Proceedings of the 47th Annual Meeting of the Association for Computational Linguistics (ACL2009), стр. 271–279. Singapore, (августа 2009)