@article{AIHP_1951__12_3_131_0,
     author = {Ingraham, Richard L.},
     title = {L'ennuple projectif et l'unification des th\'eories de l'\'electromagn\'etisme de {Weyl} et de {Veblen-Hoffmann}},
     journal = {Annales de l'institut Henri Poincar\'e},
     pages = {131--158},
     publisher = {INSTITUT HENRI POINCAR\'E ET GAUTHIER-VILLARS},
     volume = {12},
     number = {3},
     year = {1951},
     mrnumber = {48197},
     zbl = {0045.11401},
     language = {fr},
     url = {http://www.numdam.org/item/AIHP_1951__12_3_131_0/}
}