@article{optimaloffpolicyevaluationfrommultiple,
  title = {Optimal Off-Policy Evaluation from Multiple Logging Policies},
  author = {Nathan Kallus and Yuta Saito and Masatoshi Uehara},
  year = {2020},
  eprint = {2010.11002},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2010.11002v1},
}