TY  - JOUR
AU  - P. Sarnak
AU  - R.S. Phillips
TI  - On cusp forms for co-finite subgroups of PSL(2, IR).
JO  - Inventiones mathematicae
PY  - 1985
SP  - 339
EP  - 364
VL  - 80
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM_1985__80_143234/
ID  - IM_1985__80_143234
ER  -