%0 Journal Article
%A I. V. Aliev
%T Completeness of a system of root elements of a fourth-order operator-differential equation
%J Differencialʹnye uravneniâ
%D 1999
%P 313-318
%V 35
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1999_35_3_a4/
%G ru
%F DE_1999_35_3_a4