%0 Journal Article
%A Akbas, M.
%A Singerman, D.
%T The normalizer of Γ0(N) in PSL(2, R)
%J Glasgow mathematical journal
%D 1990
%P 317-327
%V 32
%N 3
%U http://geodesic.mathdoc.fr/articles/10.1017/S001708950000940X/
%R 10.1017/S001708950000940X
%F 10_1017_S001708950000940X