%0 Journal Article %A Gunnar Carlsson %T On the Rank of Abelian Groups Acting Freely on (Sn)k. %J Inventiones mathematicae %D 1982 %P 393-400 %V 69 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1982__69_142960/ %F IM_1982__69_142960