@article{10_37236_874,
     author = {Marietjie Frick and Susan A van Aardt and Jean E Dunbar and Morten H Nielsen and Ortrud R Oellermann},
     title = {A traceability conjecture for oriented graphs},
     journal = {The electronic journal of combinatorics},
     year = {2008},
     volume = {15},
     doi = {10.37236/874},
     zbl = {1178.05046},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/874/}
}