@article{IM_1988__92_1_143576,
     author = {William Browder and Alejandro Adem},
     title = {The free rank of symmetry of {(Sn)k.}},
     journal = {Inventiones mathematicae},
     pages = {431--440},
     publisher = {mathdoc},
     volume = {92},
     number = {1},
     year = {1988},
     zbl = {0644.57022},
     url = {http://geodesic.mathdoc.fr/item/IM_1988__92_1_143576/}
}