@article{proofsupplementlearningsparsecausal,
  title = {Proof Supplement - Learning Sparse Causal Models is not NP-hard (UAI2013)},
  author = {Tom Claassen and Joris M. Mooij and Tom Heskes},
  year = {2014},
  eprint = {1411.1557},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1411.1557v1},
}