@article{JMLR:v13:qin12a,
  author  = {Zhiwei Qin and Donald Goldfarb},
  title   = {Structured Sparsity via Alternating Direction Methods},
  journal = {Journal of Machine Learning Research},
  year    = {2012},
  volume  = {13},
  number  = {48},
  pages   = {1435--1468},
  url     = {http://jmlr.org/papers/v13/qin12a.html}
}