%0 Journal Article %A E. M. Dyn'kin %T Nonanalytic symmetry principle and conformal mappings %J Algebra i analiz %D 1993 %P 119-142 %V 5 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/AA_1993_5_3_a3/ %G ru %F AA_1993_5_3_a3