@article{JMLR:v16:loh15a,
  author  = {Po-Ling Loh and Martin J. Wainwright},
  title   = {Regularized M-estimators with Nonconvexity: Statistical and Algorithmic Theory for Local Optima},
  journal = {Journal of Machine Learning Research},
  year    = {2015},
  volume  = {16},
  number  = {19},
  pages   = {559--616},
  url     = {http://jmlr.org/papers/v16/loh15a.html}
}