%0 Journal Article
%A V. I. Gaǐduk
%T On nonlinear oscillations in a weak external field, a description by Lagrange's equations
%J Doklady Akademii Nauk
%D 1960
%P 760-763
%V 133
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1960_133_4_a5/
%G ru
%F DAN_1960_133_4_a5