%0 Journal Article
%A J. Levine
%T Semi-Free Circel Actions on Spheres.
%J Inventiones mathematicae
%D 1973
%P 161-186
%V 22
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1973__22_142244/
%F IM_1973__22_142244