@article{CMH_1980__55_139817,
     author = {Douglas R. Anderson and I. Hambleton},
     title = {Balanced splittings of {Semi-free} actions of finite groups on homotopy spheres.},
     journal = {Commentarii mathematici Helvetici},
     pages = {130--158},
     publisher = {mathdoc},
     volume = {55},
     year = {1980},
     zbl = {0433.57017},
     url = {http://geodesic.mathdoc.fr/item/CMH_1980__55_139817/}
}