Dick De Jongh, Zhiguang Zhao. Positive Formulas in Intuitionistic and Minimal Logic. In Martin Aher, Daniel Hole, Emil Jerábek, Clemens Kupke, editors, Logic, Language, and Computation - 10th International Tbilisi Symposium on Logic, Language, and Computation, TbiLLC 2013, Gudauri, Georgia, September 23-27, 2013. Revised Selected Papers. Volume 8984 of Lecture Notes in Computer Science, pages 175-189, Springer, 2013. [doi]
Abstract is missing.