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@article{MZM_1995_57_1_a2, author = {S. B. Vakarchuk}, title = {Best linear methods of approximation and widths of classes of analytic functions in a disk}, journal = {Matemati\v{c}eskie zametki}, pages = {30--39}, publisher = {mathdoc}, volume = {57}, number = {1}, year = {1995}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1995_57_1_a2/} }
S. B. Vakarchuk. Best linear methods of approximation and widths of classes of analytic functions in a disk. Matematičeskie zametki, Tome 57 (1995) no. 1, pp. 30-39. http://geodesic.mathdoc.fr/item/MZM_1995_57_1_a2/