%0 Journal Article %A William Browder %A Alejandro Adem %T The free rank of symmetry of (Sn)k. %J Inventiones mathematicae %D 1988 %P 431-440 %V 92 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1988__92_1_143576/ %F IM_1988__92_1_143576