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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 21, No. 2, pp. 173–192, March–April, 1969.
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Dzyadyk, V.K. Investigations in the theory of the approximation of analytic functions carried out at the Mathematics Institute, Academy of Sciences of the Ukrainian SSR. Ukr Math J 21, 143–159 (1969). https://doi.org/10.1007/BF01085308
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DOI: https://doi.org/10.1007/BF01085308