@article{BUMI_1965_3_20_2_a3,
     author = {Turri, Nedda},
     title = {Alcune osservazioni sui singrammi commutati.},
     journal = {Bollettino della Unione matematica italiana},
     pages = {181--184},
     publisher = {mathdoc},
     volume = {Ser. 3, 20},
     number = {2},
     year = {1965},
     zbl = {0132.20901},
     mrnumber = {204323},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1965_3_20_2_a3/}
}