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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 27, No. 2, pp. 250–255, March–April, 1975.
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Norkin, S.K. On the set of integral curves entering a singular point. Ukr Math J 27, 201–205 (1975). https://doi.org/10.1007/BF01090006
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DOI: https://doi.org/10.1007/BF01090006