%0 Journal Article
%A Yu. G. Borisovich
%T A weak topology and periodical solutions of differential equations
%J Doklady Akademii Nauk
%D 1961
%P 1269-1272
%V 136
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1961_136_6_a1/
%G ru
%F DAN_1961_136_6_a1