@article{AIHPA_1972__16_1_1_0,
     author = {Berzi, Vittorio and Gorini, Vittorio},
     title = {On space-time, reference frames and the structure of relativity groups},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {1--22},
     publisher = {Gauthier-Villars},
     volume = {16},
     number = {1},
     year = {1972},
     mrnumber = {292475},
     zbl = {0231.58005},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1972__16_1_1_0/}
}