Exploring Unsupervised Pretraining Objectives for Machine Translation Christos Baziotis author Ivan Titov author Alexandra Birch author Barry Haddow author 2021-08 text Findings of the Association for Computational Linguistics: ACL-IJCNLP 2021 Chengqing Zong editor Fei Xia editor Wenjie Li editor Roberto Navigli editor Association for Computational Linguistics Online conference publication baziotis-etal-2021-exploring 10.18653/v1/2021.findings-acl.261 https://aclanthology.org/2021.findings-acl.261/ 2021-08 2956 2971