%0 Journal Article
%A C.M. Reis
%T On some non-rational congruences on free commutative semigroups.
%J Semigroup forum
%D 1993
%P 267-284
%V 47
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1993__47_2_135277/
%F SF_1993__47_2_135277