%0 Journal Article
%A H. Bresinsky
%T Symmetric Semigroups of Integers Generated by 4 Elements.
%J Manuscripta mathematica
%D 1975
%P 205-220
%V 17
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MM2_1975__17_154365/
%F MM2_1975__17_154365