%0 Journal Article %A Yu. T. Sil'chenko %T Eigenvalues and eigenfunctions of a differential operator with nonlocal boundary conditions %J Differencialʹnye uravneniâ %D 2006 %P 764-768 %V 42 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2006_42_6_a4/ %G ru %F DE_2006_42_6_a4