@inproceedings{distributionallyrobustpolicyevaluationan,
  title = {Distributionally Robust Policy Evaluation and Learning in Offline Contextual Bandits},
  author = {Nian Si and Fan Zhang and Zhengyuan Zhou and Jose Blanchet},
  year = {2020},
  booktitle = {ICML 2020 1},
  url = {https://proceedings.icml.cc/static/paper_files/icml/2020/2684-Paper.pdf},
}