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@article{AA_1997_9_3_a6, author = {E. M. Dyn'kin}, title = {Smoothness of a quasiconformal mapping at a point}, journal = {Algebra i analiz}, pages = {205--210}, publisher = {mathdoc}, volume = {9}, number = {3}, year = {1997}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AA_1997_9_3_a6/} }
E. M. Dyn'kin. Smoothness of a quasiconformal mapping at a point. Algebra i analiz, Tome 9 (1997) no. 3, pp. 205-210. http://geodesic.mathdoc.fr/item/AA_1997_9_3_a6/