- NAACL. 2001.
- Language Technologies 2001: The Second Meeting of the North American Chapter of the Association for Computational Linguistics, NAACL 2001, Pittsburgh, PA, USA, June 2-7, 2001. The Association for Computational Linguistics, 2001.
- NAACL. 2001.
- Proceedings of the First International Conference on Human Language Technology Research, HLT 2001, San Diego, California, March 18-21, 2001. Morgan Kaufmann, 2001.