@inproceedings{syntaxbasedattentionmaskingforneural,
  title = {Syntax-Based Attention Masking for Neural Machine Translation},
  author = {Colin McDonald and David Chiang},
  year = {2021},
  booktitle = {NAACL 2021 4},
  url = {https://aclanthology.org/2021.naacl-srw.7},
}