%0 Journal Article
%A Yu. A. Klokov
%T On Upper and Lower Functions for a Fourth-Order Ordinary Differential Equation: I
%J Differencialʹnye uravneniâ
%D 2005
%P 1074-1083
%V 41
%N 8
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2005_41_8_a7/
%G ru
%F DE_2005_41_8_a7