L. Ratinov, D. Roth, D. Downey, и M. Anderson. Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies - Volume 1, стр. 1375--1384. Stroudsburg, PA, USA, Association for Computational Linguistics, (2011)
T. Anderson, A. Hussam, B. Plummer, и N. Jacobs. Digital Libraries: People, Knowledge, and Technology, том 2555 из Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2002)