%0 Journal Article
%A L. Parson
%T On the invariants of the Hecke groups
%J Acta Arithmetica
%D 1981
%P 217-227
%V 40
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/aa-40-2-217-227/
%R 10.4064/aa-40-2-217-227
%G en
%F 10_4064_aa_40_2_217_227