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Translated from Matematicheskie Zametki, Vol. 48, No. 4, pp. 29–36, October, 1990.
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Efimov, A.V. A bound on Fourier coefficients according to the Chrestenson-Levy system in ag-locally integral metric. Mathematical Notes of the Academy of Sciences of the USSR 48, 992–997 (1990). https://doi.org/10.1007/BF01139598
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DOI: https://doi.org/10.1007/BF01139598