On suborbital graphs and related continued fractions. - Ali H. Deger; Murat Besenk; Bahadir Özgür Güler (Appl. Math. Comput., 2011)

On Suborbital Graphs for the Extended Modular Group $${ hat{ Gamma}}$$. - Serkan Kader; Bahadir Özgür Güler (Graphs Comb., 2013)

Maps Corresponding to the Subgroups Γ 0(N) of the Modular Group. - Nazli Yazici Gözütok; Ugur Gözütok; Bahadir Özgür Güler (Graphs Comb., 2019)

Quadrilateral and Hexagonal Maps Corresponding to the Subgroups Γ 0(N) of the Modular Group. - Nazli Yazici Gözütok; Bahadir Özgür Güler (Graphs Comb., 2022)