@article{01420718,
title = {Digraphs with large exponent.},
journal = {ELA. The Electronic Journal of Linear Algebra [electronic only]},
volume = {7},
year = {2000},
pages = {30-40},
zbl = {0940.05035},
language = {en},
url = {http://dml.mathdoc.fr/item/01420718}
}
Kirkland, S.; Olesky, D.D.; van den Driessche, P. Digraphs with large exponent.. ELA. The Electronic Journal of Linear Algebra [electronic only], Tome 7 (2000) pp. 30-40. http://gdmltest.u-ga.fr/item/01420718/