@article{AIHPA_1981__34_4_437_0,
     author = {Kerner, Richard},
     title = {Geometrical background for the unified field theories : the {Einstein-Cartan} theory over a principal fibre bundle},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {437--463},
     publisher = {Gauthier-Villars},
     volume = {34},
     number = {4},
     year = {1981},
     mrnumber = {625174},
     zbl = {0474.53060},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AIHPA_1981__34_4_437_0/}
}