%0 Journal Article
%A A. V. Arkhangel'skii
%T The frequency spectrum of a topological space and the classification of spaces
%J Doklady Akademii Nauk
%D 1972
%P 265-268
%V 206
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1972_206_2_a0/
%G ru
%F DAN_1972_206_2_a0