%0 Journal Article
%A I. S. Lomov
%T On the basis property of systems of nonregular root vectors of higher-order differential operators
%J Differencialʹnye uravneniâ
%D 1993
%P 74-86
%V 29
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1993_29_1_a10/
%G ru
%F DE_1993_29_1_a10