@article{AIHPA_1978__29_2_207_0,
     author = {Papapetrou, A.},
     title = {Perturbations \`a sym\'etrie sph\'erique de la m\'etrique d'un univers en expansion, {II}},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {207--215},
     publisher = {Gauthier-Villars},
     volume = {29},
     number = {2},
     year = {1978},
     zbl = {0433.53015},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/AIHPA_1978__29_2_207_0/}
}