%0 Journal Article
%A A. A. Sapozhenko
%T The number of antichains in ranked partially ordered sets
%J Diskretnaya Matematika
%D 1989
%P 35-58
%V 1
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DM_1989_1_1_a7/
%G ru
%F DM_1989_1_1_a7