4 citations to https://www.mathnet.ru/eng/dan27975
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Sh. A. Balgimbayeva, “Nonlinear approximation of function spaces of mixed smoothness”, Siberian Math. J., 56:2 (2015), 262–274
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“The List of S.M. Nikol'skii's Works”, Proc. Steklov Inst. Math., 248 (2005), 2–20
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V. N. Temlyakov, “Approximation of functions with a bounded mixed difference by trigonometric polynomials, and the widths of some classes of functions”, Math. USSR-Izv., 20:1 (1983), 173–187
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Yu. A. Brudnyi, “Approximation of functions of $n$ variables by quasipolynomials”, Math. USSR-Izv., 4:3 (1970), 568–586