@article{JMLR:v17:14-199,
  author  = {Shusen Wang and Luo Luo and Zhihua Zhang},
  title   = {SPSD Matrix Approximation vis Column Selection: Theories, Algorithms, and Extensions},
  journal = {Journal of Machine Learning Research},
  year    = {2016},
  volume  = {17},
  number  = {49},
  pages   = {1--49},
  url     = {http://jmlr.org/papers/v17/14-199.html}
}