%0 Journal Article
%A Knopp, Marvin I.
%T Rational period functions of the modular group II
%J Glasgow mathematical journal
%D 1981
%P 185-197
%V 22
%N 2
%U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500004663/
%R 10.1017/S0017089500004663
%F 10_1017_S0017089500004663