@inproceedings{papini2019optimistic,
  author = {Papini, Matteo and Metelli, Alberto Maria and Lupo, Lorenzo and Restelli, Marcello},
  title = {Optimistic Policy Optimization via Multiple Importance Sampling},
  booktitle = {International Conference on Machine Learning ({ICML})},
  volume = {97},
  pages = {4989--4999},
  year = {2019},
  publisher = {PMLR},
  url = {http://proceedings.mlr.press/v97/papini19a.html}
}