@inproceedings{takingthecorrectiondifficultyintoaccount,
  title = {Taking the Correction Difficulty into Account in Grammatical Error Correction Evaluation},
  author = {Takumi Gotou and Ryo Nagata and Masato Mita and Kazuaki Hanawa},
  year = {2020},
  booktitle = {COLING 2020 8},
  url = {https://aclanthology.org/2020.coling-main.188},
}