%0 Journal Article %A A. N. Vagin %T Distortion theory for multivalent quasiconformal mappings of the %J Doklady Akademii Nauk %D 1987 %P 1036-1039 %V 297 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1987_297_5_a1/ %G ru %F DAN_1987_297_5_a1