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Translated from Ukrainskii Matematicheskii Zhurnal, Vol.21, No. 4, pp. 102–107, July–August, 1968.
We wish Academician N. P. Erugin many years more of good health and success in science.
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Mitropol'skii, Y.A., Shtokalo, I.Z. & Yablonskii, A.I. Nikolai Pavlovich Erugin (on the occasion of his sixtieth birthday). Ukr Math J 19, 468–472 (1967). https://doi.org/10.1007/BF01090406
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DOI: https://doi.org/10.1007/BF01090406