%0 Journal Article %A William Browder %A Wu-Chung Hsiang %T G-actions and the Fundamental Group. %J Inventiones mathematicae %D 1981 %P 411-424 %V 65 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1981__65_142857/ %F IM_1981__65_142857