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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 33, No, 2, pp. 199–207, March–April, 1981.
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Nagainik, A.F. Absolute summation of sequences by binary methods. Ukr Math J 33, 157–162 (1981). https://doi.org/10.1007/BF01086073
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DOI: https://doi.org/10.1007/BF01086073