@article{efficientmixednormregularization,
  title = {Efficient Mixed-Norm Regularization: Algorithms and Safe Screening Methods},
  author = {Jie Wang and Jun Liu and Jieping Ye},
  year = {2013},
  eprint = {1307.4156},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1307.4156v1},
}