%0 Journal Article
%A P.R. Jones
%T The Hopf property and K-free products of semigroups.
%J Semigroup forum
%D 1980
%P 343-368
%V 20
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1980__20_134427/
%F SF_1980__20_134427