%0 Journal Article %A Yoshie Katsurada %T On a Certain Property of Closed Hypersurfaces in an EINSTEIN Space. %J Commentarii mathematici Helvetici %D 1963 %P 165-171 %V 38 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1963__38_139273/ %F CMH_1963__38_139273