%0 Journal Article
%A A. L. Kunitsyn
%T The stability in the critical case of pure imaginary roots, with internal resonance
%J Differencialʹnye uravneniâ
%D 1971
%P 1704-1706
%V 7
%N 9
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1971_7_9_a19/
%G ru
%F DE_1971_7_9_a19