@article{JMLR:v21:17-788,
  author  = {Xin Zhang and Qing Mai and Hui Zou},
  title   = {The Maximum Separation Subspace in Sufficient Dimension Reduction with Categorical Response},
  journal = {Journal of Machine Learning Research},
  year    = {2020},
  volume  = {21},
  number  = {29},
  pages   = {1--36},
  url     = {http://jmlr.org/papers/v21/17-788.html}
}