%0 Journal Article
%A È. A. Tikhonova
%T An analogy between the solutions of perturbed and unperturbed systems and the completeness of a divided diagonal matrix
%J Differencialʹnye uravneniâ
%D 1969
%P 1037-1054
%V 5
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1969_5_6_a6/
%G ru
%F DE_1969_5_6_a6