@article{optimalpredictionforsparselinearmodels,
  title = {Optimal prediction for sparse linear models? Lower bounds for coordinate-separable M-estimators},
  author = {Yuchen Zhang and Martin J. Wainwright and Michael. I. Jordan},
  year = {2015},
  eprint = {1503.03188},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1503.03188v2},
}