%0 Journal Article %A Dariusz Partyka %T A distortion theorem for quasiconformal automorphisms of the unit disk %J Annales Polonici Mathematici %D 1991 %P 277-281 %V 55 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-55-1-277-281/ %R 10.4064/ap-55-1-277-281 %G en %F 10_4064_ap_55_1_277_281