%0 Journal Article
%A Pechanec-Drahoš, Jaroslav
%T Modifications of closure collections
%J Czechoslovak Mathematical Journal
%D 1971
%P 577-589
%V 21
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1971.101057/
%R 10.21136/CMJ.1971.101057
%G en
%F 10_21136_CMJ_1971_101057