%0 Journal Article
%A N. N. Petrov
%T Certain invariant sets of control systems
%J Differencialʹnye uravneniâ
%D 1973
%P 2095-2096
%V 9
%N 11
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1973_9_11_a23/
%G ru
%F DE_1973_9_11_a23