@article{10_4153_CMB_1987_051_3,
     author = {Hoffman, Michael},
     title = {Free {Actions} of {Abelian} {Groups} on a {Cartesian} {Power} of an {Even} {Sphere}},
     journal = {Canadian mathematical bulletin},
     pages = {358--362},
     year = {1987},
     volume = {30},
     number = {3},
     doi = {10.4153/CMB-1987-051-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1987-051-3/}
}