@article{AIHPA_1969__11_2_239_0,
     author = {Gilson, J.-G.},
     title = {Relativistic quantum mass distributions on velocity space},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {239--249},
     publisher = {Gauthier-Villars},
     volume = {11},
     number = {2},
     year = {1969},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AIHPA_1969__11_2_239_0/}
}