Cangül, İ. N. 1993. Normal Subgroups of Hecke Groups. Pure Mathematics Colloquium , (Southampton, United Kingdom).

Cangül, İ. N., (1993). Normal Subgroups of Hecke Groups . Pure Mathematics Colloquium, Southampton, United Kingdom

Cangül, İSMAİL. "Normal Subgroups of Hecke Groups," Pure Mathematics Colloquium, Southampton, United Kingdom, 1993

Cangül, İSMAİL N. . "Normal Subgroups of Hecke Groups." Pure Mathematics Colloquium , Southampton, United Kingdom, 1993

Cangül, İ. N. (1993) . "Normal Subgroups of Hecke Groups." Pure Mathematics Colloquium , Southampton, United Kingdom.

@conferencepaper{conferencepaper, author={İSMAİL NACİ CANGÜL}, title={Normal Subgroups of Hecke Groups}, congress name={Pure Mathematics Colloquium}, city={Southampton}, country={United Kingdom}, year={1993}}