%0 Journal Article
%A I. Levi
%T On the set of ranges of a transformation semigroup.
%J Semigroup forum
%D 1985
%P 219-226
%V 31
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1985__31_134748/
%F SF_1985__31_134748