YILMAZ ÖZGÜR, N. And CANGÜL, İ. N. 2004. On the Principal Congruence Subgroups of the Hecke Group H 5. Contributions to Algebra and Geometry , vol.45, no.1 , 75-85.

YILMAZ ÖZGÜR, N., & CANGÜL, İ. N., (2004). On the Principal Congruence Subgroups of the Hecke Group H 5. Contributions to Algebra and Geometry , vol.45, no.1, 75-85.

YILMAZ ÖZGÜR, NİHAL, And İSMAİL NACİ CANGÜL. "On the Principal Congruence Subgroups of the Hecke Group H 5," Contributions to Algebra and Geometry , vol.45, no.1, 75-85, 2004

YILMAZ ÖZGÜR, NİHAL Y. And CANGÜL, İSMAİL N. . "On the Principal Congruence Subgroups of the Hecke Group H 5." Contributions to Algebra and Geometry , vol.45, no.1, pp.75-85, 2004

YILMAZ ÖZGÜR, N. And CANGÜL, İ. N. (2004) . "On the Principal Congruence Subgroups of the Hecke Group H 5." Contributions to Algebra and Geometry , vol.45, no.1, pp.75-85.

@article{article, author={NİHAL YILMAZ ÖZGÜR And author={İSMAİL NACİ CANGÜL}, title={On the Principal Congruence Subgroups of the Hecke Group H 5}, journal={Contributions to Algebra and Geometry}, year=2004, pages={75-85} }