@article{BUMI_1957_3_12_2_a24,
     author = {Ginatempo, Nicola},
     title = {Su un teorema di {Betti.}},
     journal = {Bollettino della Unione matematica italiana},
     pages = {312--315},
     publisher = {mathdoc},
     volume = {Ser. 3, 12},
     number = {2},
     year = {1957},
     zbl = {0077.04904},
     mrnumber = {89858},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1957_3_12_2_a24/}
}