%0 Journal Article
%A R.M. Capocelli
%T On optimal factorization of free semigroups into free subsemigroups.
%J Semigroup forum
%D 1980
%P 199-212
%V 19
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1980__19_134383/
%F SF_1980__19_134383