%0 Journal Article
%A Vera Trnkova
%T On the closure of classes of spaces under $\omega$-mappings
%J Doklady Akademii Nauk
%D 1964
%P 272-274
%V 156
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1964_156_2_a9/
%G ru
%F DAN_1964_156_2_a9