Yutaka Miyazaki. The structure of the lattice of normal extensions of modal logics with cyclic axioms. In Lev D. Beklemishev, Stéphane Demri, András Maté, editors, Advances in Modal Logic 11, proceedings of the 11th conference on "Advances in Modal Logic," held in Budapest, Hungary, August 30 - September 2, 2016. pages 489-502, College Publications, 2016. [doi]
Abstract is missing.