Cangül, İ. N. And Bizim, O. 1997. Construction of some Finite Classes of Normal Subgroups of Hecke Groups. Problemy Matematyczne , vol.15 , 47-55.

Cangül, İ. N., & Bizim, O., (1997). Construction of some Finite Classes of Normal Subgroups of Hecke Groups. Problemy Matematyczne , vol.15, 47-55.

Cangül, İSMAİL, And OSMAN BİZİM. "Construction of some Finite Classes of Normal Subgroups of Hecke Groups," Problemy Matematyczne , vol.15, 47-55, 1997

Cangül, İSMAİL N. And Bizim, OSMAN. "Construction of some Finite Classes of Normal Subgroups of Hecke Groups." Problemy Matematyczne , vol.15, pp.47-55, 1997

Cangül, İ. N. And Bizim, O. (1997) . "Construction of some Finite Classes of Normal Subgroups of Hecke Groups." Problemy Matematyczne , vol.15, pp.47-55.

@article{article, author={İSMAİL NACİ CANGÜL And author={OSMAN BİZİM}, title={Construction of some Finite Classes of Normal Subgroups of Hecke Groups}, journal={Problemy Matematyczne}, year=1997, pages={47-55} }