@article{AIHPA_1971__15_1_37_0,
     author = {Gallone, Franco and Mania', Alessandro},
     title = {Group representations by automorphisms of a proposition system},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {37--59},
     publisher = {Gauthier-Villars},
     volume = {15},
     number = {1},
     year = {1971},
     mrnumber = {287813},
     zbl = {0249.43019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AIHPA_1971__15_1_37_0/}
}