%0 Journal Article %A Ya. T. Sultanaev %T Asymptotic behavior of the spectrum of ordinary differential operators in the degenerate case %J Differencialʹnye uravneniâ %D 1982 %P 1694-1702 %V 18 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1982_18_10_a5/ %G ru %F DE_1982_18_10_a5