%0 Journal Article
%A Ju.G. Koselev
%T On a multiplication  of semigroup varieties.
%J Semigroup forum
%D 1992
%P 1-8
%V 45
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1992__45_3_135165/
%G en
%F SF_1992__45_3_135165