Y. Chan, and D. Roth. Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies - Volume 1, page 551--560. Stroudsburg, PA, USA, Association for Computational Linguistics, (2011)
C. Carpineto. Proceedings of the 10th International Conference on Conceptual Structures (ICCS 2002), volume 2393 of Lecture Notes in Computer Science, page 1. Springer, (2002)