References

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  8. Temlyakov V.N. Approximation of functions with bounded mixed derivative. Tr. Mat. Inst. Steklova 1986, 178 (2), 1–112. (in Russian)
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  10. Vlasyk H.M. Bernstein-Nikol’skii-Type Inequalities for Trigonometric Polynomials with an Arbitrary Choice of Harmonics. Ukrainian Math. J. 2017, 69 (2), 173–185. doi:10.1007/s11253-017-1355-1
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