@article{BUMI_2003_8_6B_1_a3,
     author = {Oxenham, Martin and Casse, Rey},
     title = {Towards the determination of the regular $n$-covers of $PG(3,q)$},
     journal = {Bollettino della Unione matematica italiana},
     pages = {57--87},
     publisher = {mathdoc},
     volume = {Ser. 8, 6B},
     number = {1},
     year = {2003},
     zbl = {1177.51007},
     mrnumber = {877206},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_2003_8_6B_1_a3/}
}