%0 Journal Article
%A Levi, Sandro
%T Closed mappings are open at a $G_\delta $ set
%J Portugaliae mathematica
%D 1979
%P 7-9
%V 38
%N 3-4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PORMA_1979__38_3-4_115385/
%G en
%F PORMA_1979__38_3-4_115385