G. Marco Baroni, Georgiana Dinu. 52nd Annual Meeting of the Association for Computational Linguistics, ACL 2014 - Proceedings of the Conference, (2014)
D. Tang, F. Wei, N. Yang, M. Zhou, T. Liu, and B. Qin. Proceedings of the 52nd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers), page 1555--1565. Baltimore, Maryland, Association for Computational Linguistics, (June 2014)