%0 Journal Article
%A A. A. Levakov
%T On the controllability of linear nonstationary systems
%J Differencialʹnye uravneniâ
%D 1987
%P 798-806
%V 23
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1987_23_5_a7/
%G ru
%F DE_1987_23_5_a7