@article{structuredsparseregressionviagreedyhard,
  title = {Structured Sparse Regression via Greedy Hard-Thresholding},
  author = {Prateek Jain and Nikhil Rao and Inderjit Dhillon},
  year = {2016},
  eprint = {1602.06042},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1602.06042v2},
}