@article{universalapproximationdepthanderrorsof,
  title = {Universal Approximation Depth and Errors of Narrow Belief Networks with Discrete Units},
  author = {Guido F. Montúfar},
  year = {2013},
  eprint = {1303.7461},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1303.7461v2},
}