@inproceedings{shapinglevelsetswithsubmodularfunctions,
  title = {Shaping Level Sets with Submodular Functions},
  author = {Francis R. Bach},
  year = {2011},
  booktitle = {NeurIPS 2011 12},
  url = {http://papers.nips.cc/paper/4457-shaping-level-sets-with-submodular-functions},
}