S. Bergsma, M. Post, and D. Yarowsky. Proceedings of the 2012 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, page 327--337. Association for Computational Linguistics, (2012)
M. Koppel, J. Schler, and K. Zigdon. Proceedings of the eleventh ACM SIGKDD international conference on Knowledge discovery in data mining, page 624--628. ACM, (2005)