P. Xia, S. Wu, and B. Van Durme. Proceedings of the 2020 Conference on Empirical Methods in Natural Language Processing (EMNLP), page 7516--7533. Association for Computational Linguistics, (November 2020)
M. Peters, M. Neumann, R. Logan, R. Schwartz, V. Joshi, S. Singh, and N. Smith. Proceedings of the 2019 Conference on Empirical Methods in Natural Language Processing and the 9th International Joint Conference on Natural Language Processing (EMNLP-IJCNLP), page 43--54. Hong Kong, China, Association for Computational Linguistics, (November 2019)