%0 Journal Article
%A Thomas Nordah1
%T CANCELLATIVE SEMIGROUPS WITH NON-EMPTY CENTER.
%J Semigroup forum
%D 1975
%P 170-177
%V 11
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1975__11_134139/
%G en
%F SF_1975__11_134139