@article{ontheexpressiveefficiencyofsumproduct,
  title = {On the Expressive Efficiency of Sum Product Networks},
  author = {James Martens and Venkatesh Medabalimi},
  year = {2014},
  eprint = {1411.7717},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1411.7717v3},
}