@inproceedings{istunbabel2021submissionforthequality,
  title = {IST-Unbabel 2021 Submission for the Quality Estimation Shared Task},
  author = {Chrysoula Zerva and Daan van Stigt and Ricardo Rei and Ana C Farinha and Pedro Ramos and José G. C. de Souza and Taisiya Glushkova and Miguel Vera and Fabio Kepler and André F. T. Martins},
  year = {2021},
  booktitle = {WMT (EMNLP) 2021 11},
  url = {https://aclanthology.org/2021.wmt-1.102},
}