%0 Journal Article
%A A. P. Ivanov
%T On the problem of observation of perturbed systems
%J Differencialʹnye uravneniâ
%D 1978
%P 2071-2072
%V 14
%N 11
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1978_14_11_a16/
%G ru
%F DE_1978_14_11_a16