JiJi Zhang and Peter Spirtes. A Characterization of Markov Equivalence Classes for Ancestral Graphical Models.
Emilija PerkovićJohannes TextorMarkus KalischMarloes H. Maathuis
R. Ayesha AliThomas S. RichardsonPeter Spirtes
Steven B. GillispieChristiane Lemieux
Steen A. AnderssonMichael D. Perlman