%0 Journal Article
%A A.Y.W. Lau
%T Costability in SEM and TSL.
%J Semigroup forum
%D 1972
%P 370-372
%V 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1972__5_133954/
%F SF_1972__5_133954