@article{AIHPA_1969__11_3_277_0,
     author = {Lapiedra, R.},
     title = {Sur les \'equations d'ordre sup\'erieur du champ gravitationnel},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {277--307},
     publisher = {Gauthier-Villars},
     volume = {11},
     number = {3},
     year = {1969},
     mrnumber = {258420},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/AIHPA_1969__11_3_277_0/}
}