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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 38, No. 2, pp. 139–143, March–April, 1986.
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Andrievskii, V.V. A smoothness problem for an integral of Cauchy type. Ukr Math J 38, 123–126 (1986). https://doi.org/10.1007/BF01058465
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DOI: https://doi.org/10.1007/BF01058465