@article{10_37236_1087,
     author = {Uwe Schauz},
     title = {Colorings and orientations of matrices and graphs},
     journal = {The electronic journal of combinatorics},
     year = {2006},
     volume = {13},
     doi = {10.37236/1087},
     zbl = {1100.05039},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1087/}
}