%0 Journal Article
%A V. Gould
%T The characterisation of monoids by properties of their  S-systems.
%J Semigroup forum
%D 1985
%P 251-266
%V 32
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1985__32_134785/
%F SF_1985__32_134785