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)
Y. Chen, G. Dong, J. Han, B. Wah, and J. Wang. Proceedings of the 28th international conference on Very Large Data Bases, page 323--334. VLDB Endowment, (2002)