TY  - JOUR
AU  - Morris Newman
TI  - Formulas and Multiplicative Relationships for the Parameters of Subgroups of the Modular Group.
JO  - Mathematische Annalen
PY  - 1974
SP  - 173
EP  - 182
VL  - 212
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MAN_1974__212_182743/
ID  - MAN_1974__212_182743
ER  -