%0 Journal Article %A V. V. Kornienko %T On the Spectrum of Degenerate Operator Equations %J Matematičeskie zametki %D 2000 %P 677-691 %V 68 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_2000_68_5_a4/ %G ru %F MZM_2000_68_5_a4