@article{FAA_1973_7_4_a14, author = {A. S. Nemirovskii}, title = {Polynomial approximation of functions in a {Hilbert} space}, journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a}, pages = {88--89}, publisher = {mathdoc}, volume = {7}, number = {4}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/FAA_1973_7_4_a14/} }