TY  - JOUR
AU  - Sebbar, Abdellah
TI  - Modular Subgroups, Forms, Curves and Surfaces
JO  - Canadian mathematical bulletin
PY  - 2002
SP  - 294
EP  - 308
VL  - 45
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-2002-033-1/
DO  - 10.4153/CMB-2002-033-1
ID  - 10_4153_CMB_2002_033_1
ER  -