@article{IM_1982__69_142960,
     author = {Gunnar Carlsson},
     title = {On the {Rank} of {Abelian} {Groups} {Acting} {Freely} on {(Sn)k.}},
     journal = {Inventiones mathematicae},
     pages = {393--400},
     publisher = {mathdoc},
     volume = {69},
     year = {1982},
     zbl = {0517.57020},
     url = {http://geodesic.mathdoc.fr/item/IM_1982__69_142960/}
}