author    = {Markus Freitag and Ricardo Rei and Nitika Mathur and Chi-kiu Lo and Craig Stewart and George Foster and Alon Lavie and Ondřej Bojar},
  year      = 2021,
  title     = {Results of the WMT21 Metrics Shared Task: Evaluating Metrics with Expert-based Human Evaluations on TED and News Domain},
  booktitle = {Proceedings of the Sixth Conference on Machine Translation},
  pages     = {733--774},
  publisher = {Association for Computational Linguistics},
  address   = {Online},
  isbn      = {978-1-954085-94-7},