@article{JMLR:v24:22-0881,
  author  = {Zhengyu Zhou and Weiwei Liu},
  title   = {Sample Complexity for Distributionally Robust Learning under chi-square divergence},
  journal = {Journal of Machine Learning Research},
  year    = {2023},
  volume  = {24},
  number  = {230},
  pages   = {1--27},
  url     = {http://jmlr.org/papers/v24/22-0881.html}
}