Approximative properties of the Weierstrass integrals on the classes WrβHα by Grabova, U.Z., Kal'chuk, I.V., Stepaniuk, T.A.

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Estimates of uniform approximations by Zygmund sums on classes of convolutions of periodic functions by Serdyuk, A. S., Grabova, U. Z., Сердюк, А. С., Грабова, У. З.

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Solution of the Kolmogorov-Nikol’skii problem for three-harmonic Poisson integrals on classes $C^{\psi}_{\beta,\infty}$ by Grabova, U. Z., Kal’chuk, I. V., Грабова, У. З., Кальчук, І. В.

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On approximation of classes $W^1_{\infty}$ by Poisson sums by Gembarskyi, M. V., Grabova, U. Z., Kalchuk, I. V., Гембарський, М. В., Грабова, У. З., Кальчук, І. В.

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