%0 Journal Article
%A N. N. Petrov
%T Certain questions of the control theory in the plane
%J Differencialʹnye uravneniâ
%D 1973
%P 1058-1067
%V 9
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1973_9_6_a7/
%G ru
%F DE_1973_9_6_a7