TY  - JOUR
AU  - Lehner, J.
TI  - Diophantine approximation on Hecke groups
JO  - Glasgow mathematical journal
PY  - 1985
SP  - 117
EP  - 127
VL  - 26
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500006121/
DO  - 10.1017/S0017089500006121
ID  - 10_1017_S0017089500006121
ER  -