@incollection{TMCH99,
  author =	 "B. Thiesson and C. Meek and D.M. Chickering and
                  D. Heckerman",
  editor =	 "J.M. Bernardo and J.O. Berger and A.P. Dawid and
                  A.F.M. Smith",
  title =	 "Computationally Efficient Methods for Selecting
                  Among Mixtures of Graphical Models",
  booktitle =	 "Bayesian Statistics 6",
  year =	 1999,
  publisher =	 "Oxford University Press",
  pages =	 "631-656"
}