%0 Journal Article
%A J. Lewis
%A D. Zagier
%T Period functions for Maass wave forms. I
%J Annals of mathematics
%D 2001
%V 153
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM_2001_153_1_a3/
%F AM_2001_153_1_a3