@article{DAN_1981_258_6_a2,
     author = {A. A. Dmitriev and E. M. Semenov},
     title = {Optimality of {M.~Riesz's} interpolation theorem in the upper triangle},
     journal = {Doklady Akademii Nauk},
     pages = {1298--1300},
     publisher = {mathdoc},
     volume = {258},
     number = {6},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_258_6_a2/}
}