@inproceedings{documentlevelrelationextractionwithdual,
  title = {Document-level Relation Extraction with Dual-tier Heterogeneous Graph},
  author = {Zhenyu Zhang and Bowen Yu and Xiaobo Shu and Tingwen Liu and Hengzhu Tang and Wang Yubin and Li Guo},
  year = {2020},
  booktitle = {COLING 2020 8},
  url = {https://aclanthology.org/2020.coling-main.143},
}