@article{AIHP_1959__16_3_115_0,
     author = {Halbwachs, Francis and Hillion, Pierre and Vigier, Jean-Pierre},
     title = {Th\'eorie math\'ematique des angles {d'Euler} dans l'espace-temps},
     journal = {Annales de l'institut Henri Poincar\'e},
     pages = {115--143},
     publisher = {INSTITUT HENRI POINCAR\'E ET GAUTHIER-VILLARS},
     volume = {16},
     number = {3},
     year = {1959},
     mrnumber = {118451},
     zbl = {0099.22501},
     language = {fr},
     url = {http://www.numdam.org/item/AIHP_1959__16_3_115_0/}
}