T. Rindflesch, J. Rajan, and L. Hunter. Proceedings of the sixth conference on Applied natural language processing, page 188--195. Morristown, NJ, USA, Association for Computational Linguistics, (2000)
N. Collier, C. Nobata, and J. ichi Tsujii. Proceedings of the 18th conference on Computational linguistics, page 201--207. Morristown, NJ, USA, Association for Computational Linguistics, (2000)