J. Boyd-Graber, and D. Blei. Proceedings of the Fourth International Workshop on Semantic Evaluations (SemEval-2007), page 277--281. Prague, Czech Republic, Association for Computational Linguistics, (June 2007)
B. Hsu, and J. Glass. EMNLP '06: Proceedings of the 2006 Conference on Empirical Methods in Natural Language Processing, page 373--381. Morristown, NJ, USA, Association for Computational Linguistics, (2006)
X. Wei, and B. Croft. SIGIR '06: Proceedings of the 29th annual international ACM SIGIR conference on Research and development in information retrieval, page 178--185. New York, NY, USA, ACM Press, (2006)