%0 Journal Article
%A V. A. Weber
%T The stability in the critical case of several pairs of pure imaginary roots for systems with aftereffect
%J Differencialʹnye uravneniâ
%D 1969
%P 1614-1625
%V 5
%N 9
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1969_5_9_a7/
%G ru
%F DE_1969_5_9_a7