%0 Journal Article
%A A. D. Morozov
%T The complete qualitative investigation of Duffing's equation
%J Differencialʹnye uravneniâ
%D 1976
%P 241-255
%V 12
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1976_12_2_a6/
%G ru
%F DE_1976_12_2_a6