%0 Journal Article
%A V. D. Budaev
%T The property of being an unconditional basis of systems of eigen- and associated functions of a second-order operator with discontinuous coefficients
%J Doklady Akademii Nauk
%D 1986
%P 777-780
%V 289
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1986_289_4_a0/
%G ru
%F DAN_1986_289_4_a0