%0 Journal Article
%A Yung-Chow Wong
%T A New Curvature Theory for Surfaces in a Euclidean 4-Space.
%J Commentarii mathematici Helvetici
%D 1952
%P 152-170
%V 26
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1952__26_139042/
%F CMH_1952__26_139042