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
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM_2001_153_1_a3/
ID  - AM_2001_153_1_a3
ER  -