@article{AIHPA_1971__14_4_285_0,
     author = {von Westenholz, C.},
     title = {On a modified classification scheme for elementary particles},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {285--293},
     publisher = {Gauthier-Villars},
     volume = {14},
     number = {4},
     year = {1971},
     mrnumber = {287821},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AIHPA_1971__14_4_285_0/}
}