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Translated fromSibirskii Matematicheskii Zhurnal, Vol. 36, No. 4, pp. 927–933, July–August, 1995.
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Falaleev, L.P. On exact constants for matrix summation methods. Sib Math J 36, 800–806 (1995). https://doi.org/10.1007/BF02107338
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DOI: https://doi.org/10.1007/BF02107338