%0 Journal Article %A Stefan Bergman %T Some distortion theorems related to an invariant metric in C² %J Colloquium Mathematicum %D 1967 %P 67-90 %V 16 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-16-1-67-90/ %R 10.4064/cm-16-1-67-90 %G en %F 10_4064_cm_16_1_67_90