%0 Journal Article
%A S. A. Nefedov
%A F. A. Sholokhovich
%T A criterion for $\varepsilon $-controllability of a linear system
%J Differencialʹnye uravneniâ
%D 1976
%P 653-657
%V 12
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1976_12_4_a8/
%G ru
%F DE_1976_12_4_a8