@article{BUMI_1949_3_4_1_a0,
     author = {Levi, Beppo},
     title = {Sopra l'aritmetica transfinita},
     journal = {Bollettino della Unione matematica italiana},
     pages = {1--6},
     year = {1949},
     volume = {Ser. 3, 4},
     number = {1},
     zbl = {0033.05102},
     mrnumber = {29962},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1949_3_4_1_a0/}
}