@article{BUMI_1932_1_11_1_a7,
     author = {Tortorici, Pietro},
     title = {Le congruenze $W_{ab}$ a parametro medio costante},
     journal = {Bollettino della Unione matematica italiana},
     pages = {22--28},
     publisher = {mathdoc},
     volume = {Ser. 1, 11},
     number = {1},
     year = {1932},
     zbl = {0003.41203},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1932_1_11_1_a7/}
}