%0 Journal Article
%A Pondělíček, Bedřich
%T A Relation for Closure Operations on a Semigroup
%J Mathematica slovaca
%D 1973
%P 249-256
%V 23
%N 3
%U http://geodesic.mathdoc.fr/item/MASLO_1973_23_3_a7/
%G en
%F MASLO_1973_23_3_a7