@article{BUMI_1959_3_14_4_a8,
     author = {Speranza, Francesco},
     title = {Sulla normale affine.},
     journal = {Bollettino della Unione matematica italiana},
     pages = {504--515},
     publisher = {mathdoc},
     volume = {Ser. 3, 14},
     number = {4},
     year = {1959},
     zbl = {0094.16505},
     mrnumber = {112087},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1959_3_14_4_a8/}
}