@article{BUMI_2004_8_7B_2_a6,
     author = {Fontanari, Claudio},
     title = {Grassmann defective surfaces},
     journal = {Bollettino della Unione matematica italiana},
     pages = {369--379},
     publisher = {mathdoc},
     volume = {Ser. 8, 7B},
     number = {2},
     year = {2004},
     zbl = {1150.14014},
     mrnumber = {1859030},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_2004_8_7B_2_a6/}
}