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Original Russian Text © S. Yu. Artamonov, 2015, published in Matematicheskie Zametki, 2015, Vol. 97, No. 5, pp. 794–797.
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Artamonov, S.Y. Direct Jackson-type estimate for the general modulus of smoothness in the nonperiodic case. Math Notes 97, 811–814 (2015). https://doi.org/10.1134/S0001434615050168
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DOI: https://doi.org/10.1134/S0001434615050168