@article{gradientbasedsparseprincipalcomponent,
  title = {Gradient-based Sparse Principal Component Analysis with Extensions to Online Learning},
  author = {Yixuan Qiu and Jing Lei and Kathryn Roeder},
  year = {2019},
  eprint = {1911.08048},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1911.08048v1},
}