@article{MAN_1983__264_163800,
     author = {Ib Madsen and Steffen Bentzen},
     title = {On the {Swan} {Subgroup} of {Certain} {Periodic} {Groups.}},
     journal = {Mathematische Annalen},
     pages = {447--474},
     publisher = {mathdoc},
     volume = {264},
     year = {1983},
     zbl = {0505.18003},
     url = {http://geodesic.mathdoc.fr/item/MAN_1983__264_163800/}
}