Self-Training for Unsupervised Neural Machine Translation in Unbalanced Training Data Scenarios Haipeng Sun author Rui Wang author Kehai Chen author Masao Utiyama author Eiichiro Sumita author Tiejun Zhao author 2021-06 text Proceedings of the 2021 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies Kristina Toutanova editor Anna Rumshisky editor Luke Zettlemoyer editor Dilek Hakkani-Tur editor Iz Beltagy editor Steven Bethard editor Ryan Cotterell editor Tanmoy Chakraborty editor Yichao Zhou editor Association for Computational Linguistics Online conference publication sun-etal-2021-self 10.18653/v1/2021.naacl-main.311 https://aclanthology.org/2021.naacl-main.311/ 2021-06 3975 3981