Jiji Zhang. A Characterization of Markov Equivalence Classes for Directed Acyclic Graphs with Latent Variables. In Ronald Parr, Linda C. van der Gaag, editors, UAI 2007, Proceedings of the Twenty-Third Conference on Uncertainty in Artificial Intelligence, Vancouver, BC, Canada, July 19-22, 2007. pages 450-457, AUAI Press, 2007. [doi]
Abstract is missing.