@article{BUMI_1933_1_12_2_a7,
     author = {Vitali, Giuseppe.},
     title = {Del {Ragionare}},
     journal = {Bollettino della Unione matematica italiana},
     pages = {89--94},
     publisher = {mathdoc},
     volume = {Ser. 1, 12},
     number = {2},
     year = {1933},
     zbl = {59.0859.01},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1933_1_12_2_a7/}
}