%0 Journal Article
%A M. Racheva
%T On Estimating of a Fourth-Order Differential Equations
%J Mathematica balkanica
%D 2001
%P 239
%V 15
%N 3-4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MABA_2001_15_3-4_a5/
%F MABA_2001_15_3-4_a5