@misc{BUMI_1931_1_10_5_a12,
     title = {Corrispondenza},
     journal = {Bollettino della Unione matematica italiana},
     pages = {319--323},
     publisher = {mathdoc},
     volume = {Ser. 1, 10},
     number = {5},
     year = {1931},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1931_1_10_5_a12/}
}