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Yaroslavl'. Translated from Sibirskii Matematicheskii Zhurnal, Vol. 28, No. 5, pp. 203–215, September–October, 1987.
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Shvartsman, P.A. Traces of functions of Zygmund class. Sib Math J 28, 853–863 (1987). https://doi.org/10.1007/BF00969335
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DOI: https://doi.org/10.1007/BF00969335