Geodesic
On estimates for the widths of classes of infinitely differentiable functions
Matematičeskie zametki, Tome 47 (1990) no. 5, pp. 155-157 
V. N. Temlyakov. On estimates for the widths of classes of infinitely differentiable functions. Matematičeskie zametki, Tome 47 (1990) no. 5, pp. 155-157. http://geodesic.mathdoc.fr/item/MZM_1990_47_5_a22/
@article{MZM_1990_47_5_a22,
     author = {V. N. Temlyakov},
     title = {On estimates for the widths of classes of infinitely differentiable functions},
     journal = {Matemati\v{c}eskie zametki},
     pages = {155--157},
     year = {1990},
     volume = {47},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1990_47_5_a22/}
}
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