%0 Journal Article %A M. L. Rasulov %T An expansion formula for a spectral problem with boundary conditions containing derivatives of higher order than the equation %J Differencialʹnye uravneniâ %D 1982 %P 2149-2166 %V 18 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1982_18_12_a6/ %G ru %F DE_1982_18_12_a6