@article{efficientregularizedregressionforvariabl,
  title = {Efficient Regularized Regression for Variable Selection with L0 Penalty},
  author = {Zhenqiu Liu and Gang Li},
  year = {2014},
  eprint = {1407.7508},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1407.7508v1},
}