D. Bamman, S. Popat, and S. Shen. Proceedings of the 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Volume 1 (Long and Short Papers), page 2138--2144. Minneapolis, Minnesota, Association for Computational Linguistics, (June 2019)
M. Iyyer, A. Guha, S. Chaturvedi, J. Boyd-Graber, and H. Daumé III. Proceedings of the 2016 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, page 1534-1544. The Association for Computational Linguistics, (2016)