%0 Journal Article
%A Joseph A. Wolf
%T Isotropic Manifolds of Indefinite Metric.
%J Commentarii mathematici Helvetici
%D 1964
%P 21-64
%V 39
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1964__39_139280/
%F CMH_1964__39_139280