Linear and Kolmogorov widths of the classes BΩp,θ of periodic functions of one and several variables von M. V. Hembarskyi, S. B. Hembarska

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Approximate characteristics of the classes BΩ,p,θ of periodic functions of one variable and many ones von M. V. Hembarskyi, S. B. Hembarska

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Widths of the classes BΩr,θ of periodic functions of many variables in the space B1,1 von M. V. Hembarskyi, S. B. Hembarska

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On approximation of classes W1∞ by Poisson sums von M. V. Hembarskyi, U. Z. Hrabova, I. V. Kalchuk

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