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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 41, No. 4, pp. 485–492, April, 1989.
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Konovalov, V.N. Uniform approximation by algebraic polynomials and continuation of functions of many real variables. Ukr Math J 41, 423–428 (1989). https://doi.org/10.1007/BF01060620
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DOI: https://doi.org/10.1007/BF01060620