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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 32, No. 6, pp. 843–846, November–December, 1980.
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Mel'nichak, P.P. Cauchy problem for equations in radial differentials. Ukr Math J 32, 582–584 (1980). https://doi.org/10.1007/BF01087195
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DOI: https://doi.org/10.1007/BF01087195