@inproceedings{zhang2021drl4ir,
  title={Drl4ir: 2nd workshop on deep reinforcement learning for information retrieval},
  author={Zhang, Weinan and Zhao, Xiangyu and Zhao, Li and Yin, Dawei and Yang, Grace Hui},
  booktitle={Proceedings of the 44th International ACM SIGIR Conference on Research and Development in Information Retrieval},
  pages={2681--2684},
  year={2021}
}