@article{efficientcontextualbanditsinnon,
  title = {Efficient Contextual Bandits in Non-stationary Worlds},
  author = {Haipeng Luo and Chen-Yu Wei and Alekh Agarwal and John Langford},
  year = {2017},
  eprint = {1708.01799},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1708.01799v4},
}