%0 Journal Article
%A K. K. Kammatov
%T Oscillations in certain essentially nonlinear systems
%J Differencialʹnye uravneniâ
%D 1971
%P 997-1006
%V 7
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1971_7_6_a5/
%G ru
%F DE_1971_7_6_a5