%0 Journal Article %A Martin Chuaqui %A Brad Osgood %T The Schwarzian derivative and conformally natural quasiconformal extensions from one to two to three dimensions. %J Mathematische Annalen %D 1992 %P 267-280 %V 292 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1992__292_2_164914/ %F MAN_1992__292_2_164914