%0 Journal Article
%A Stefano Marchiafava
%T Characterization of Riemannian Manifolds with Weak Homology Group G2 (Following A. Gray).
%J Mathematische Zeitschrift
%D 1981
%P 157-162
%V 178
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZ_1981__178_173094/
%F MZ_1981__178_173094