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@article{DAN_1964_157_2_a6, author = {I. P. Mityuk}, title = {The symmetrization principle for multiply connected domains}, journal = {Doklady Akademii Nauk}, pages = {268--270}, publisher = {mathdoc}, volume = {157}, number = {2}, year = {1964}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1964_157_2_a6/} }
I. P. Mityuk. The symmetrization principle for multiply connected domains. Doklady Akademii Nauk, Tome 157 (1964) no. 2, pp. 268-270. http://geodesic.mathdoc.fr/item/DAN_1964_157_2_a6/