%0 Journal Article %A Douglas R. Anderson %A Erik K. Pedersen %T Semifree Topological Actions of Finite Groups on Spheres. %J Mathematische Annalen %D 1983 %P 23-44 %V 265 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1983__265_163808/ %F MAN_1983__265_163808