%0 Journal Article
%A John K. Beem
%A Philipp E. Parker
%T Values of pseudoriemannian sectional cuvature.
%J Commentarii mathematici Helvetici
%D 1984
%P 319-332
%V 59
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1984__59_139978/
%F CMH_1984__59_139978