%0 Journal Article
%A A. F. Zubova
%T Investigation of oscillations and stability
%J Differencialʹnye uravneniâ
%D 1979
%P 1960-1966
%V 15
%N 11
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1979_15_11_a4/
%G ru
%F DE_1979_15_11_a4