%0 Journal Article
%A N. B. Kerimov
%T On necessary and sufficient conditions for the basis property of systems of root functions of a differential operator
%J Differencialʹnye uravneniâ
%D 1996
%P 37-43
%V 32
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1996_32_1_a5/
%G ru
%F DE_1996_32_1_a5