A. Ritter, S. Clark, Mausam, и O. Etzioni. Proceedings of the Conference on Empirical Methods in Natural Language Processing, стр. 1524--1534. Stroudsburg, PA, USA, Association for Computational Linguistics, (2011)
X. Liu, S. Zhang, F. Wei, и M. Zhou. Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies - Volume 1, стр. 359--367. Stroudsburg, PA, USA, Association for Computational Linguistics, (2011)