%0 Journal Article %A M. B. Muratbekov %T Coercive estimates for a higher-order differential operator %J Differencialʹnye uravneniâ %D 1981 %P 893-901 %V 17 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1981_17_5_a13/ %G ru %F DE_1981_17_5_a13