R. Reichart, and A. Rappoport. Proceedings of the Thirteenth Conference on Computational Natural Language Learning, page 165--173. Morristown, NJ, USA, Association for Computational Linguistics, (2009)
M. Rosell, V. Kann, and J. Litton. International Conference on Natural Language Processing, Allied Publishers Private Limited, pp, page 207--216. (2004)
E. Agirre, and A. Soroa. Proceedings of the Fourth International Workshop on Semantic Evaluations (SemEval-2007), page 7--12. Prague, Czech Republic, Association for Computational Linguistics, (June 2007)