Heights in finite projective space, and a problem on directed graphs.
Nathanson, Melvyn B. ; Sullivan, Blair D.
Integers, Tome 8 (2008), / Harvested from The Electronic Library of Mathematics
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Publié le : 2008-01-01
EUDML-ID : urn:eudml:doc:117361 
@article{05557869,
     title = {Heights in finite projective space, and a problem on directed graphs.},
     journal = {Integers},
     volume = {8},
     year = {2008},
     zbl = {1177.11010},
     language = {en},
     url = {http://dml.mathdoc.fr/item/05557869}
}

Nathanson, Melvyn B.; Sullivan, Blair D. Heights in finite projective space, and a problem on directed graphs.. Integers, Tome 8 (2008) . http://gdmltest.u-ga.fr/item/05557869/