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Translated from Sibirskii Matematicheskii Zhurnal, Vol. 19, No. 3, pp. 547–554, May–June, 1978.
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Vasil'chik, M.Y. A lower estimate for the distortion coefficient for infinitely close domains. Sib Math J 19, 383–389 (1978). https://doi.org/10.1007/BF01875287
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DOI: https://doi.org/10.1007/BF01875287