@article{AIHPA_1972__17_2_159_0,
     author = {von Westenholz, C.},
     title = {The principle of minimal electromagnetic interaction in terms of pure geometry},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {159--170},
     publisher = {Gauthier-Villars},
     volume = {17},
     number = {2},
     year = {1972},
     mrnumber = {327257},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AIHPA_1972__17_2_159_0/}
}