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@article{DAN_1987_294_5_a10, author = {V. N. Temlyakov}, title = {On the widths of function classes}, journal = {Doklady Akademii Nauk}, pages = {1069--1072}, publisher = {mathdoc}, volume = {294}, number = {5}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1987_294_5_a10/} }
V. N. Temlyakov. On the widths of function classes. Doklady Akademii Nauk, Tome 294 (1987) no. 5, pp. 1069-1072. http://geodesic.mathdoc.fr/item/DAN_1987_294_5_a10/