%0 Journal Article
%A V. V. Filippov
%T On a theorem of Kneser
%J Differencialʹnye uravneniâ
%D 1987
%P 2068-2074
%V 23
%N 12
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1987_23_12_a6/
%G ru
%F DE_1987_23_12_a6