TY  - JOUR
AU  - J. Lewis
AU  - D. Zagier
TI  - Period functions for Maass wave forms. I.
JO  - Annals of mathematics
PY  - 2001
VL  - 153
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.2307/2661374/
DO  - 10.2307/2661374
ID  - 10_2307_2661374
ER  -