%0 Journal Article %A N. A. Rustamov %T Asymptotic behavior of the eigenvalues of a fourth-order differential operator %J Differencialʹnye uravneniâ %D 1987 %P 2004-2006 %V 23 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1987_23_11_a22/ %G ru %F DE_1987_23_11_a22