Maurizio Gabbrielli, Giorgio Levi, Daniele Turi. A Two Steps Semantics for Logic Programs with Negation. In Andrei Voronkov, editor, Logic Programming and Automated Reasoning,International Conference LPAR 92, St. Petersburg, Russia, July 15-20, 1992, Proceedings. Volume 624 of Lecture Notes in Computer Science, pages 297-308, Springer, 1992.
Abstract is missing.