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Translated from Matematicheskii Zametki, Vol. 49, No. 3, pp. 66–72, March, 1991.
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Nersesyan, A.A. Bounded point derivations on R(x) and approximation with simultaneous interpolation. Mathematical Notes of the Academy of Sciences of the USSR 49, 272–276 (1991). https://doi.org/10.1007/BF01158302
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DOI: https://doi.org/10.1007/BF01158302