G. Brewka, T. Eiter, S. McIlraith (ed.):
"Principles of Knowledge Representation and Reasoning: Proceedings of the Thirteenth International Conference, KR 2012";
AAAI Press, Menlo Park, California, U.S.A., 2012, ISBN: 978-1-57735-560-1; 676 pages.
http://www.aaai.org/ocs/index.php/KR/KR12/schedConf/presentations