@article{AIHPA_1968__9_2_179_0,
     author = {Papapetrou, A. and Hamoui, A.},
     title = {Couches simples de mati\`ere en relativit\'e g\'en\'erale},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {179--211},
     year = {1968},
     publisher = {Gauthier-Villars},
     volume = {9},
     number = {2},
     mrnumber = {273982},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/AIHPA_1968__9_2_179_0/}
}