%0 Journal Article
%A F. W. Gehring
%A Gunnar af Hällström
%T A distrotion theorem for functions univalent in an annulus
%J Annales Fennici Mathematici
%D 1963
%V 316-335
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1963.325/
%R 10.5186/aasfm.1963.325
%G en
%F AFM_1963_316-335_a10