@inproceedings{xu-etal-2021-vocabulary,
    title = "Vocabulary Learning via Optimal Transport for Neural Machine Translation",
    author = "Xu, Jingjing  and
      Zhou, Hao  and
      Gan, Chun  and
      Zheng, Zaixiang  and
      Li, Lei",
    editor = "Zong, Chengqing  and
      Xia, Fei  and
      Li, Wenjie  and
      Navigli, Roberto",
    booktitle = "Proceedings of the 59th Annual Meeting of the Association for Computational Linguistics and the 11th International Joint Conference on Natural Language Processing (Volume 1: Long Papers)",
    month = aug,
    year = "2021",
    address = "Online",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/2021.acl-long.571/",
    doi = "10.18653/v1/2021.acl-long.571",
    pages = "7361--7373"
}