@article{BUMI_1999_8_2A_1S_a12,
     author = {Rampichini, Marta},
     title = {Link fibrati scambiabili},
     journal = {Bollettino della Unione matematica italiana},
     pages = {53--56},
     publisher = {mathdoc},
     volume = {Ser. 8, 2A},
     number = {1S},
     year = {1999},
     zbl = {0724.57001},
     mrnumber = {1154731},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1999_8_2A_1S_a12/}
}