%0 Journal Article
%A Katsumi Nomizu
%A Marcos Dajczer
%T On Sectional Curvature of Indefinite Metrics, II.
%J Mathematische Annalen
%D 1980
%P 279-282
%V 247
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAN_1980__247_163364/
%F MAN_1980__247_163364