%0 Journal Article
%A Jussi Väisälä
%A F.W. Gehring
%T On the Geometric Definition for Quasiconformal Mappings.
%J Commentarii mathematici Helvetici
%D 1961
%P 19-32
%V 36
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1961__36_139225/
%F CMH_1961__36_139225