T. Elsayed, J. Lin, и D. Oard. Proceedings of the 46th Annual Meeting of the Association for Computational Linguistics on Human Language Technologies: Short Papers, стр. 265--268. Stroudsburg, PA, USA, Association for Computational Linguistics, (2008)
J. Lin. SIGIR '09: Proceedings of the 32nd international ACM SIGIR conference on Research and development in information retrieval, стр. 155--162. New York, NY, USA, ACM, (2009)