%0 Journal Article %A A. A. Dmitriev %A E. M. Semenov %T Optimality of M.~Riesz's interpolation theorem in the upper triangle %J Doklady Akademii Nauk %D 1981 %P 1298-1300 %V 258 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1981_258_6_a2/ %G ru %F DAN_1981_258_6_a2