Vol.1, No.3
A constructive method for the cycloidal normal free subgroups of finite index of Hecke groups $H(\sqrt{2})$ and $H(\sqrt{3})$
Author : Setenay Doğan, Musa Demirci, Osman Bizim, İsmail Naci Cangül
Author : Setenay Doğan, Musa Demirci, Osman Bizim, İsmail Naci Cangül