Martin Sachenbacher, Brian C. Williams. Conflict-Directed A* Search for Soft Constraints. In J. Christopher Beck, Barbara M. Smith, editors, Integration of AI and OR Techniques in Constraint Programming for Combinatorial Optimization Problems, Third International Conference, CPAIOR 2006, Cork, Ireland, May 31 - June 2, 2006, Proceedings. Volume 3990 of Lecture Notes in Computer Science, pages 182-196, Springer, 2006. [doi]