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Reports given at the International Conference on the Theory of Approximation to Functions. Kaluga, July 24–28, 1975.
Translated from Matematicheskie Zametki, Vol. 20, No. 3, pp. 409–416, September, 1976.
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Vasil'ev, R.K. The order of approximation to functions on sets by polynomial operators in the class Sm . Mathematical Notes of the Academy of Sciences of the USSR 20, 785–789 (1976). https://doi.org/10.1007/BF01097251
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DOI: https://doi.org/10.1007/BF01097251