@article{variancereductioningradientexploration,
  title = {Variance Reduction in Gradient Exploration for Online Learning to Rank},
  author = {Huazheng Wang and Sonwoo Kim and Eric McCord-Snook and Qingyun Wu and Hongning Wang},
  year = {2019},
  eprint = {1906.03766},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1906.03766v3},
}