%0 Journal Article
%A Günter Köhler
%T On Hsiao's conjecture on Hecke groups.
%J Mathematica Scandinavica
%D 1981
%P 56-58
%V 48
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1981__48_166736/
%F MS2_1981__48_166736