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@article{MZM_1984_35_3_a6, author = {V. N. Konovalov}, title = {Estimates of {Kolmogorov-type} widths for classes of differentiable periodic functions}, journal = {Matemati\v{c}eskie zametki}, pages = {369--380}, publisher = {mathdoc}, volume = {35}, number = {3}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1984_35_3_a6/} }
V. N. Konovalov. Estimates of Kolmogorov-type widths for classes of differentiable periodic functions. Matematičeskie zametki, Tome 35 (1984) no. 3, pp. 369-380. http://geodesic.mathdoc.fr/item/MZM_1984_35_3_a6/