%0 Journal Article %A Yu. A. Dubinskii %T A certain class of differential operator equations of higher order %J Doklady Akademii Nauk %D 1969 %P 982-985 %V 187 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1969_187_5_a4/ %G ru %F DAN_1969_187_5_a4