%0 Journal Article
%A Ya. Kurzweil
%T Invariant sets of differential systems
%J Differencialʹnye uravneniâ
%D 1968
%P 785-797
%V 4
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1968_4_5_a2/
%G ru
%F DE_1968_4_5_a2