%0 Journal Article
%A Švec, Alois
%T On the existence of parallel normal vector fields of surfaces in $E^4$
%J Czechoslovak Mathematical Journal
%D 1976
%P 297-303
%V 26
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1976.101402/
%R 10.21136/CMJ.1976.101402
%G en
%F 10_21136_CMJ_1976_101402