%0 Journal Article
%A Havel, Václav
%T Join systems and closure spaces
%J Commentationes Mathematicae Universitatis Carolinae
%D 1966
%P 335-341
%V 07
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_1966__7_3_a8/
%G en
%F CMUC_1966__7_3_a8