%0 Journal Article
%A N. N. Petrov
%T A remark on plane analytic control systems
%J Differencialʹnye uravneniâ
%D 1979
%P 743-744
%V 15
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1979_15_4_a22/
%G ru
%F DE_1979_15_4_a22