%0 Journal Article %A V. D. Budaev %T Some properties of root vector functions of a higher-order operator %J Differencialʹnye uravneniâ %D 1993 %P 30-40 %V 29 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1993_29_1_a4/ %G ru %F DE_1993_29_1_a4