Fangqing Dong, Hiroshi Nakagawa. Semantics of Non-montonic Reasoning based on Perfect Model. In Koichi Furukawa, Hozumi Tanaka, Tetsunosuke Fujisaki, editors, Logic Programming 89, Proceedings of the 8th Conference, Tokyo, Japan, July 12-14, 1989. Volume 485 of Lecture Notes in Computer Science, pages 38-53, Springer, 1989.
Abstract is missing.