%0 Journal Article
%A D. FERUS
%T On the Type Number of Hypersurfaces in Spaces of Constant Curvature.
%J Mathematische Annalen
%D 1970
%P 310-316
%V 187
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAN_1970__187_162027/
%F MAN_1970__187_162027