R. Snow, B. O'Connor, D. Jurafsky, und A. Ng. Proceedings of the 2008 Conference on Empirical Methods in Natural Language Processing, Seite 254--263. Honolulu, Hawaii, Association for Computational Linguistics, (Oktober 2008)
G. Muzny, M. Fang, A. Chang, und D. Jurafsky. Proceedings of the 15th Conference of the European Chapter of the Association for Computational Linguistics: Volume 1, Long Papers, Seite 460--470. Valencia, Spain, Association for Computational Linguistics, (April 2017)