@article{budgetconstrainedbiddingbymodelfree,
  title = {Budget Constrained Bidding by Model-free Reinforcement Learning in Display Advertising},
  author = {Di Wu and Xiujun Chen and Xun Yang and Hao Wang and Qing Tan and Xiaoxun Zhang and Jian Xu and Kun Gai},
  year = {2018},
  eprint = {1802.08365},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1802.08365v6},
}