%0 Journal Article %A G. Sh. Guseinov %T On the spectral analysis of a quadratic pencil of Sturm–Liouville operators %J Doklady Akademii Nauk %D 1985 %P 1292-1296 %V 285 %N 6 %U http://geodesic.mathdoc.fr/item/DAN_1985_285_6_a1/ %G ru %F DAN_1985_285_6_a1