@article{newperspectivesonksupportandcluster,
  title = {New Perspectives on k-Support and Cluster Norms},
  author = {Andrew M. McDonald and Massimiliano Pontil and Dimitris Stamos},
  year = {2014},
  eprint = {1403.1481},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1403.1481v1},
}