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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 39, No. 2, pp. 168–173, March–April, 1987.
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Korneichuk, N.P. Optimal coding of elements of a metric space. Ukr Math J 39, 139–143 (1987). https://doi.org/10.1007/BF01057493
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DOI: https://doi.org/10.1007/BF01057493