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@article{MZM_2005_78_5_a13, author = {S. B. Vakarchuk}, title = {Exact {Constants} in {Jackson-type} {Inequalities} and {Exact} {Values} of {Widths}}, journal = {Matemati\v{c}eskie zametki}, pages = {792--796}, publisher = {mathdoc}, volume = {78}, number = {5}, year = {2005}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_2005_78_5_a13/} }
S. B. Vakarchuk. Exact Constants in Jackson-type Inequalities and Exact Values of Widths. Matematičeskie zametki, Tome 78 (2005) no. 5, pp. 792-796. http://geodesic.mathdoc.fr/item/MZM_2005_78_5_a13/
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