%0 Journal Article %A G. E. Shikina %T Inequalities of Hilbert and Hausdorff--Young--Riesz type with respect to a system of eigen- and associated functions of an even-order differential operator %J Doklady Akademii Nauk %D 1993 %P 556-558 %V 329 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1993_329_5_a7/ %G ru %F DAN_1993_329_5_a7