TY  - JOUR
AU  - Gilman, Jane
TI  - Inequalities in Discrete Subgroups of PSL(2, R)
JO  - Canadian journal of mathematics
PY  - 1988
SP  - 115
EP  - 130
VL  - 40
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1988-005-x/
DO  - 10.4153/CJM-1988-005-x
ID  - 10_4153_CJM_1988_005_x
ER  -