@inproceedings{liu-etal-2021-copying,
    title = "On the Copying Behaviors of Pre-Training for Neural Machine Translation",
    author = "Liu, Xuebo  and
      Wang, Longyue  and
      Wong, Derek F.  and
      Ding, Liang  and
      Chao, Lidia S.  and
      Shi, Shuming  and
      Tu, Zhaopeng",
    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.373/",
    doi = "10.18653/v1/2021.findings-acl.373",
    pages = "4265--4275"
}