Literature cited
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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 24, No. 2, pp. 268–273, March–April, 1972.
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Nikolaeva, R.V., Repnina, L.G. A generalization of a theorem of livingston. Ukr Math J 24, 224–227 (1972). https://doi.org/10.1007/BF01086818
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DOI: https://doi.org/10.1007/BF01086818