@article{progressivescaleboundaryblackboxattack,
  title = {Progressive-Scale Boundary Blackbox Attack via Projective Gradient Estimation},
  author = {Jiawei Zhang and Linyi Li and Huichen Li and Xiaolu Zhang and Shuang Yang and Bo Li},
  year = {2021},
  eprint = {2106.06056},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2106.06056v1},
}