TY  - DATA
AU  - Hejhal, Dennis A.
TI  - Eigenvalues of the Laplacian for Hecke triangle groups 
T2  - Memoirs of the American Mathematical Society, 
SN  - 9781470408954 (online)
PY  - 1992///
CY  - Providence, R.I.
PB  - American Mathematical Society
UR  - http://www.ams.org/memo/0469
ER  -