@inproceedings{zhang2016picking,
  title={Picking Deep Filter Responses for Fine-grained Image Recognition},
  author={Zhang, Xiaopeng and Xiong, Hongkai and Zhou, Wengang and Lin, Weiyao and Tian, Qi},
  booktitle={Proc. IEEE Comput. Vis. Pattern Recognit.},
  year={2016}
}