References
N. P. Korneichuk, A. A. Ligun, and V. G. Doronin, Constrained Approximation (Naukova Dumka, Kiev, 1982) [in Russian].
V. I. Ruban, Dokl. Akad. Nauk SSSR 225 (1), 34 (1980) [Sov. Math., Dokl. 22, 658 (1980)].
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Original Russian Text © M. A. Chakhkiev, 2016, published in Matematicheskie Zametki, 2016, Vol. 100, No. 2, pp. 318–320.
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Chakhkiev, M.A. The question of the exact value of one-sided width remains open. Math Notes 100, 341–342 (2016). https://doi.org/10.1134/S0001434616070324
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DOI: https://doi.org/10.1134/S0001434616070324