@article{10_37236_1844,
     author = {Sebastian M. Cioab\u{a}},
     title = {Bounds on the {Tur\'an} density of {PG(3,} 2)},
     journal = {The electronic journal of combinatorics},
     year = {2004},
     volume = {11},
     number = {1},
     doi = {10.37236/1844},
     zbl = {1053.05066},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1844/}
}