@article{groupsparsesignaldenoisingnonconvex,
  title = {Group-Sparse Signal Denoising: Non-Convex Regularization, Convex Optimization},
  author = {Po-Yu Chen and Ivan W. Selesnick},
  year = {2013},
  eprint = {1308.5038},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1308.5038v2},
}