%0 Journal Article
%A Jing Yu
%T A Cuspidal Class Number Formula for the Modular Curves X1(N).
%J Mathematische Annalen
%D 1980
%P 197-216
%V 252
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAN_1980__252_163456/
%F MAN_1980__252_163456