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Translated from Sibirskii Matematicheskii Zhurnal, Vol. 20, No. 4, p. 924, July–August, 1979.
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Basil'chik, M.Y. Letters to the editor. Sib Math J 20, 655 (1979). https://doi.org/10.1007/BF00970379
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DOI: https://doi.org/10.1007/BF00970379