@inproceedings{hierarchicalregionlearningfornestednamed,
  title = {Hierarchical Region Learning for Nested Named Entity Recognition},
  author = {Xinwei Long and Shuzi Niu and Yucheng Li},
  year = {2020},
  booktitle = {Findings of the Association for Computational Linguistics 2020},
  url = {https://aclanthology.org/2020.findings-emnlp.430},
}