%0 Journal Article
%A I. P. Martynov
%A G. T. Mozhdzher
%T On first integrals of a fourth-order equation
%J Differencialʹnye uravneniâ
%D 2004
%P 1701-1704
%V 40
%N 12
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2004_40_12_a13/
%G ru
%F DE_2004_40_12_a13