James Koussas, Tomasz Kowalski, Yutaka Miyazaki, Michael Stevens. Normal Extensions of KTB of Codimension 3. In Guram Bezhanishvili, Giovanna D'Agostino, George Metcalfe, Thomas Studer, editors, Advances in Modal Logic 12, proceedings of the 12th conference on "Advances in Modal Logic," held in Bern, Switzerland, August 27-31, 2018. pages 447-458, College Publications, 2018. [doi]
Abstract is missing.