@article{asymptoticmodelselectionfordirected,
  title = {Asymptotic Model Selection for Directed Networks with Hidden Variables},
  author = {Dan Geiger and David Heckerman and Christopher Meek},
  year = {2013},
  eprint = {1302.3580},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1302.3580v2},
}