@article{CMH_1952__26_139052,
     author = {George de de Rham},
     title = {Sur la r\'eductibilit\'e d'un espace de {Riemann.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {328--344},
     publisher = {mathdoc},
     volume = {26},
     year = {1952},
     zbl = {0048.15701},
     url = {http://geodesic.mathdoc.fr/item/CMH_1952__26_139052/}
}