Pierangelo Miglioli, Ugo Moscato, Mario Ornaghi. Refutation Systems for Propositional Modal Logics. In Peter Baumgartner, Reiner Hähnle, Joachim Posegga, editors, Theorem Proving with Analytic Tableaux and Related Methods, 4th International Workshop, TABLEAUX 95, Schloß Rheinfels, St. Goar, Germany, May 7-10, 1995, Proceedings. Volume 918 of Lecture Notes in Computer Science, pages 95-105, Springer, 1995.
Abstract is missing.