@article{BUMI_1951_3_6_1_a14,
     author = {Cattaneo, Paolo},
     title = {Sui numeri quasiperfetti},
     journal = {Bollettino della Unione matematica italiana},
     pages = {59--62},
     publisher = {mathdoc},
     volume = {Ser. 3, 6},
     number = {1},
     year = {1951},
     zbl = {0042.26804},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1951_3_6_1_a14/}
}