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Translated from Matematicheskie Zametki, Vol. 38, No. 2, pp. 270–277, August, 1985.
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Kholshchevnikova, N.N. Uncountable R-sets and N-sets. Mathematical Notes of the Academy of Sciences of the USSR 38, 660–664 (1985). https://doi.org/10.1007/BF01156249
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DOI: https://doi.org/10.1007/BF01156249