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Additional information
Kemerovo. Translated from Sibirskii Matematicheskii Zhurnal, Vol. 31, No. 1, pp. 202–204, January–February, 1990.
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Semenov, V.I., Sheenko, S.I. Extremal problems in the theory of quasiconformal mappings. Sib Math J 31, 171–173 (1990). https://doi.org/10.1007/BF00971166
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DOI: https://doi.org/10.1007/BF00971166