Özdemir, H. B. Et Al. 2006. A method for finding normal subgroups of Hecke groups. Proc. of the Jangjeon Math. Soc., , vol.9 , 51-55.

Özdemir, H. B., Demirci, M., & Cangül, İ. N., (2006). A method for finding normal subgroups of Hecke groups. Proc. of the Jangjeon Math. Soc., , vol.9, 51-55.

Özdemir, Hasan, MUSA DEMİRCİ, And İSMAİL NACİ CANGÜL. "A method for finding normal subgroups of Hecke groups," Proc. of the Jangjeon Math. Soc., , vol.9, 51-55, 2006

Özdemir, Hasan B. Et Al. "A method for finding normal subgroups of Hecke groups." Proc. of the Jangjeon Math. Soc., , vol.9, pp.51-55, 2006

Özdemir, H. B. Demirci, M. And Cangül, İ. N. (2006) . "A method for finding normal subgroups of Hecke groups." Proc. of the Jangjeon Math. Soc., , vol.9, pp.51-55.

@article{article, author={Hasan Basri Özdemir Et Al. }, title={A method for finding normal subgroups of Hecke groups}, journal={Proc. of the Jangjeon Math. Soc., }, year=2006, pages={51-55} }