@article{JMLR:v21:19-569,
  author  = {Puyudi Yang and Jianbo Chen and Cho-Jui Hsieh and Jane-Ling Wang and Michael I. Jordan},
  title   = {Greedy Attack and Gumbel Attack: Generating Adversarial Examples for Discrete Data},
  journal = {Journal of Machine Learning Research},
  year    = {2020},
  volume  = {21},
  number  = {43},
  pages   = {1--36},
  url     = {http://jmlr.org/papers/v21/19-569.html}
}