%0 Journal Article
%A A. S. Pechentsov
%T Basis properties of eigenfunctions of a boundary value problem in the case of a multiple root of the characteristic polynomial
%J Differencialʹnye uravneniâ
%D 1988
%P 703-705
%V 24
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1988_24_4_a25/
%G ru
%F DE_1988_24_4_a25