%0 Journal Article %A Ya. T. Sultanaev %T Asymptotic behavior of the discrete spectrum of one-dimensional singular differential operators %J Differencialʹnye uravneniâ %D 1974 %P 2010-2020 %V 10 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1974_10_11_a10/ %G ru %F DE_1974_10_11_a10