@article{ren2018bidding,
  title={Bidding Machine: Learning to Bid for Directly Optimizing Profits in Display Advertising},
  author={Ren, Kan and Zhang, Weinan and Chang, Ke and Rong, Yifei and Yu, Yong and Wang, Jun},
  journal={IEEE Transactions on Knowledge and Data Engineering},
  volume={30},
  number={4},
  pages={645--659},
  year={2018},
  publisher={IEEE}
}

@inproceedings{ren2016user,
  title={User response learning for directly optimizing campaign performance in display advertising},
  author={Ren, Kan and Zhang, Weinan and Rong, Yifei and Zhang, Haifeng and Yu, Yong and Wang, Jun},
  booktitle={Proceedings of the 25th ACM International on Conference on Information and Knowledge Management},
  pages={679--688},
  year={2016},
  organization={ACM}
}