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@article{DAN_1964_154_2_a8, author = {A. F. Timan}, title = {A problem in approximation theory related to the superposition of functions}, journal = {Doklady Akademii Nauk}, pages = {274--275}, publisher = {mathdoc}, volume = {154}, number = {2}, year = {1964}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1964_154_2_a8/} }
A. F. Timan. A problem in approximation theory related to the superposition of functions. Doklady Akademii Nauk, Tome 154 (1964) no. 2, pp. 274-275. http://geodesic.mathdoc.fr/item/DAN_1964_154_2_a8/