%0 Journal Article %A Julian Lawrynowicz %T On the Parametrization of Quasiconformal Mappings with Invariant Boundary Points in an Annulus %J Commentarii mathematici Helvetici %D 1972 %P 213-219 %V 47 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1972__47_139510/ %F CMH_1972__47_139510