%0 Journal Article
%A A. P. Ivanov
%A N. E. Kirin
%T On methods of observing linear perturbable systems
%J Differencialʹnye uravneniâ
%D 1974
%P 788-791
%V 10
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1974_10_5_a2/
%G ru
%F DE_1974_10_5_a2