%0 Journal Article %A B. Rodin %A C.D. Minda %T Extremal Length, Extremal Regions and Quadratic Differentials. %J Commentarii mathematici Helvetici %D 1975 %P 455-476 %V 50 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1975__50_139634/ %F CMH_1975__50_139634