Cangül, İ. N. And Bizim, O. 2002. Commutator subgroups of Hecke Groups. Bull of Academia Sinica , vol.30 , 253-259.

Cangül, İ. N., & Bizim, O., (2002). Commutator subgroups of Hecke Groups. Bull of Academia Sinica , vol.30, 253-259.

Cangül, İSMAİL, And Osman Bizim. "Commutator subgroups of Hecke Groups," Bull of Academia Sinica , vol.30, 253-259, 2002

Cangül, İSMAİL N. And Bizim, Osman. "Commutator subgroups of Hecke Groups." Bull of Academia Sinica , vol.30, pp.253-259, 2002

Cangül, İ. N. And Bizim, O. (2002) . "Commutator subgroups of Hecke Groups." Bull of Academia Sinica , vol.30, pp.253-259.

@article{article, author={İSMAİL NACİ CANGÜL And author={Osman Bizim}, title={Commutator subgroups of Hecke Groups}, journal={Bull of Academia Sinica}, year=2002, pages={253-259} }