%0 Journal Article
%A Mati Kilp
%T Commutative monoids all of whose principal ideals are projective.
%J Semigroup forum
%D 1974
%P 334-339
%V 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1974__6_133991/
%F SF_1974__6_133991