%0 Journal Article
%A V. D. Budaev
%T The property of being an unconditional basis on a closed interval, for systems of eigen- and associated functions of a second-order operator with discontinuous coefficients
%J Differencialʹnye uravneniâ
%D 1987
%P 941-952
%V 23
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1987_23_6_a2/
%G ru
%F DE_1987_23_6_a2