Camillo Fiorentini, Mauro Ferrari. A Forward Unprovability Calculus for Intuitionistic Propositional Logic. In Renate A. Schmidt, Cláudia Nalon, editors, Automated Reasoning with Analytic Tableaux and Related Methods - 26th International Conference, TABLEAUX 2017, Brasília, Brazil, September 25-28, 2017, Proceedings. Volume 10501 of Lecture Notes in Computer Science, pages 114-130, Springer, 2017. [doi]
Abstract is missing.