@article{JMLR:v16:montufar15b,
  author  = {Guido Mont{{\'u}}far and Nihat Ay and Keyan Ghazi-Zahedi},
  title   = {Geometry and Expressive Power of Conditional Restricted Boltzmann Machines},
  journal = {Journal of Machine Learning Research},
  year    = {2015},
  volume  = {16},
  number  = {73},
  pages   = {2405--2436},
  url     = {http://jmlr.org/papers/v16/montufar15b.html}
}