@incollection{Chickering96uai,
  author =	 "D.M. Chickering",
  title =	 "Learning Equivalence Classes of {Bayesian} Network
                  Structures",
  year =	 1996,
  Booktitle =	 "Proceedings of Twelfth Conference on Uncertainty in
                  Artificial Intelligence, {\rm Portland, OR}",
  publisher =	 "Morgan Kaufmann",
  Month =	 "August",
  editors =	 "E. Horvitz and F. Jensen",
  pages =	 "150-157"
}