@article{JMLR:v24:22-0088,
  author  = {Dimitris Bertsimas and Driss Lahlou Kitane},
  title   = {Sparse PCA: a Geometric Approach},
  journal = {Journal of Machine Learning Research},
  year    = {2023},
  volume  = {24},
  number  = {32},
  pages   = {1--33},
  url     = {http://jmlr.org/papers/v24/22-0088.html}
}