Cangül, İ. N. 1992. Normal Subgroups of the Hecke Groups. Workshop on Computational Problems in the Theory of Riemann Surfaces and Related Topics , (Tenerife, Spain).

Cangül, İ. N., (1992). Normal Subgroups of the Hecke Groups . Workshop on Computational Problems in the Theory of Riemann Surfaces and Related Topics, Tenerife, Spain

Cangül, İSMAİL. "Normal Subgroups of the Hecke Groups," Workshop on Computational Problems in the Theory of Riemann Surfaces and Related Topics, Tenerife, Spain, 1992

Cangül, İSMAİL N. . "Normal Subgroups of the Hecke Groups." Workshop on Computational Problems in the Theory of Riemann Surfaces and Related Topics , Tenerife, Spain, 1992

Cangül, İ. N. (1992) . "Normal Subgroups of the Hecke Groups." Workshop on Computational Problems in the Theory of Riemann Surfaces and Related Topics , Tenerife, Spain.

@conferencepaper{conferencepaper, author={İSMAİL NACİ CANGÜL}, title={Normal Subgroups of the Hecke Groups}, congress name={Workshop on Computational Problems in the Theory of Riemann Surfaces and Related Topics}, city={Tenerife}, country={Spain}, year={1992}}