R. Ge, and R. Mooney. Proceedings of the Ninth Conference on Computational Natural Language Learning (CoNLL-2005), page 9--16. Ann Arbor, Michigan, Association for Computational Linguistics, (June 2005)
P. Liang, M. Jordan, and D. Klein. Proceedings of the Joint Conference of the 47th Annual Meeting of the ACL and the 4th International Joint Conference on Natural Language Processing of the AFNLP, page 91--99. Suntec, Singapore, Association for Computational Linguistics, (August 2009)