@article{CMH_1961__36_139233,
     author = {Jean Poncet},
     title = {Groupes de transformations d'une sph\`ere de cohomologie.},
     journal = {Commentarii mathematici Helvetici},
     pages = {148--153},
     publisher = {mathdoc},
     volume = {36},
     year = {1961},
     zbl = {0178.26503},
     url = {http://geodesic.mathdoc.fr/item/CMH_1961__36_139233/}
}