%0 Journal Article
%A R. Broeksteeg
%T A concept of variety for regular biordered sets.
%J Semigroup forum
%D 1994
%P 335-348
%V 49
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1994__49_2_135358/
%F SF_1994__49_2_135358