%0 Journal Article
%A V. I. Filippenko
%T Multiplicity of the spectrum of a~self-adjoint ordinary differential operator of odd order
%J Matematičeskie zametki
%D 1975
%P 631-638
%V 17
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1975_17_4_a14/
%G ru
%F MZM_1975_17_4_a14