%0 Journal Article %A A. G. Kostyuchenko %A B. M. Levitan %T Asymptotic behavior of the eigenvalues of the Sturm--Liouville operator problem %J Funkcionalʹnyj analiz i ego priloženiâ %D 1967 %P 86-96 %V 1 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1967_1_1_a7/ %G ru %F FAA_1967_1_1_a7