H. Xiao, M. Huang, and X. Zhu. Proceedings of the 54th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers), 1, page 2316--2325. (2016)
R. Fu, J. Guo, B. Qin, W. Che, H. Wang, and T. Liu. Proceedings of the 52nd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers), 1, page 1199--1209. (2014)
W. Zou, R. Socher, D. Cer, and C. Manning. Proceedings of the 2013 Conference on Empirical Methods in Natural Language Processing, page 1393--1398. (2013)
J. Turian, L. Ratinov, and Y. Bengio. Proceedings of the 48th annual meeting of the association for computational linguistics, page 384--394. Association for Computational Linguistics, (2010)