%0 Journal Article
%A Morgado, José
%T A characterization of the closure operators by means of one axiom
%J Portugaliae mathematica
%D 1962
%P 155-156
%V 21
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PORMA_1962__21_3_114888/
%G en
%F PORMA_1962__21_3_114888