Approximation of classes $\overline{\psi}$-differentiated functions by the Fourier sums by Bodra, V. I., Zaderey, P. V., Бодра, В. І., Задерей, П. В.

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On Lebesgue inequality of the Vallée-Poussin sums on classes ${C}^{\overline{\psi}}C$ by Veremiy, M. A., Zaderey, P. V., Веремій, М. А., Задерей, П. В.

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Estimates of the group $\varphi$ -deviations of analytic functions by Gaevskiy, M. V., Zaderey, P. V., Гаєвський, М. В., Задерей, П. В.

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