%0 Journal Article
%A R. A. Syunyaev
%T The necessity of a neutral hydrogen period in the evolution of the Universe
%J Doklady Akademii Nauk
%D 1968
%P 45-47
%V 179
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1968_179_1_a10/
%G ru
%F DAN_1968_179_1_a10