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Translated from Itogi Nauki, Seriya Matematika (Matematicheskii Analiz), pp. 109–146, 1970.
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Golubov, B.I. Series with respect to the Haar system. J Math Sci 1, 704–726 (1973). https://doi.org/10.1007/BF01236362
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DOI: https://doi.org/10.1007/BF01236362