@article{10_37236_1611,
     author = {H. A. Kierstead and W. T. Trotter},
     title = {Competitive colorings of oriented graphs},
     journal = {The electronic journal of combinatorics},
     year = {2001},
     volume = {8},
     number = {2},
     doi = {10.37236/1611},
     zbl = {0984.05032},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1611/}
}