@article{JMLR:v20:17-773,
  author  = {Luo Luo and Cheng Chen and Zhihua Zhang and Wu-Jun Li and Tong Zhang},
  title   = {Robust Frequent Directions with Application in Online Learning},
  journal = {Journal of Machine Learning Research},
  year    = {2019},
  volume  = {20},
  number  = {45},
  pages   = {1--41},
  url     = {http://jmlr.org/papers/v20/17-773.html}
}