Ajay D. Kshemkalyani, Roshan Kamath. Orthogonal Relations for Reasoning about Abstract Events. In Salem Benferhat, Philippe Besnard, editors, Symbolic and Quantitative Approaches to Reasoning with Uncertainty, 6th European Conference, ECSQARU 2001, Toulouse, France, September 19-21, 2001, Proceedings. Volume 2143 of Lecture Notes in Computer Science, pages 726-735, Springer, 2001. [doi]
Abstract is missing.