%0 Journal Article
%A D. V. Ranchin
%T Tightness, sequentiality and closed coverings
%J Doklady Akademii Nauk
%D 1977
%P 1015-1018
%V 232
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1977_232_5_a8/
%G ru
%F DAN_1977_232_5_a8