%0 Journal Article
%A L. M. Kuperman
%T On the theory of $\varepsilon $-controllability of linear systems with lag
%J Differencialʹnye uravneniâ
%D 1978
%P 1791-1795
%V 14
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1978_14_10_a7/
%G ru
%F DE_1978_14_10_a7