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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 23, No. 3, pp. 364–367, Ma–June, 1971.
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Valeev, K.G. Using an asymptotic method in the critical case of a double zero root. Ukr Math J 23, 307–309 (1971). https://doi.org/10.1007/BF01085353
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DOI: https://doi.org/10.1007/BF01085353