%0 Journal Article
%A Rainer Walden
%T Closed surfaces in four-spaces with non-vanishing normal curvature
%J Colloquium Mathematicum
%D 1982
%P 257-262
%V 46
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm-46-2-257-262/
%R 10.4064/cm-46-2-257-262
%G en
%F 10_4064_cm_46_2_257_262