%0 Journal Article
%A A. D. Morozov
%A E. L. Fedorov
%T On the investigation of equations with one degree of freedom, close to nonlinear integrable ones
%J Differencialʹnye uravneniâ
%D 1983
%P 1511-1516
%V 19
%N 9
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1983_19_9_a5/
%G ru
%F DE_1983_19_9_a5