@article{BUMI_1998_8_1A_1_a5,
     author = {Coen, Salvatore},
     title = {Un {Abbaco} d'antan},
     journal = {Bollettino della Unione matematica italiana},
     pages = {79--96},
     publisher = {mathdoc},
     volume = {Ser. 8, 1A},
     number = {1},
     year = {1998},
     zbl = {0795.01022},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1998_8_1A_1_a5/}
}