@article{representationapproximationandlearningof,
  title = {Representation, Approximation and Learning of Submodular Functions Using Low-rank Decision Trees},
  author = {Vitaly Feldman and Pravesh Kothari and Jan Vondrak},
  year = {2013},
  eprint = {1304.0730},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1304.0730v1},
}