@inproceedings{wu-etal-2021-language,
    title = "Language Tags Matter for Zero-Shot Neural Machine Translation",
    author = "Wu, Liwei  and
      Cheng, Shanbo  and
      Wang, Mingxuan  and
      Li, Lei",
    editor = "Zong, Chengqing  and
      Xia, Fei  and
      Li, Wenjie  and
      Navigli, Roberto",
    booktitle = "Findings of the Association for Computational Linguistics: ACL-IJCNLP 2021",
    month = aug,
    year = "2021",
    address = "Online",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/2021.findings-acl.264/",
    doi = "10.18653/v1/2021.findings-acl.264",
    pages = "3001--3007"
}