%0 Journal Article
%A A. V. Arkhangel'skii
%T $R$-factor mappings of spaces with a countable base
%J Doklady Akademii Nauk
%D 1986
%P 14-17
%V 287
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1986_287_1_a1/
%G ru
%F DAN_1986_287_1_a1