%0 Journal Article
%A Nachbin, Leopoldo
%T Compact unions of closed subsets are closed and compact intersections of open subsets are open
%J Portugaliae mathematica
%D 1992
%P 403-409
%V 49
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PORMA_1992__49_4_115797/
%G en
%F PORMA_1992__49_4_115797