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Additional information
Translated from Sibirskii Matematicheskii Zhurnal, Vol. 9, No. 1, pp. 136–144, January–February, 1963.
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Rusctskii, Y.I. Approximation by abel-poisson sums of functions continuous on an interval. Soviet Mathematical Journal 9, 103–109 (1968). https://doi.org/10.1007/BF02196661
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DOI: https://doi.org/10.1007/BF02196661