M. Tatu. ACL 2005, 43rd Annual Meeting of the Association for Computational Linguistics, Proceedings of the Conference, 25-30 June 2005, University of Michigan, USA, The Association for Computational Linguistics, (2005)
H. Liu, and P. Singh. Proc. of the 8th International Conference on Knowledge-Based Intelligent Information and Engineering Systems (KES-2004) - Wellingtonand New Zealand, Springer-Verlag, (September 2004)