%0 Journal Article
%A I. L. Makarov
%T Exact and truncated variational schemes in the case of a selfadjoint spectral problem for a fourth-order equation
%J Differencialʹnye uravneniâ
%D 1996
%P 670-675
%V 32
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1996_32_5_a12/
%G ru
%F DE_1996_32_5_a12