@article{10_37236_210,
     author = {Pascal Berthom\'e and Raul Cordovil and David Forge and V\'eronique Ventos and Thomas Zaslavsky},
     title = {An elementary chromatic reduction for gain graphs and special hyperplane arrangements},
     journal = {The electronic journal of combinatorics},
     year = {2009},
     volume = {16},
     number = {1},
     doi = {10.37236/210},
     zbl = {1188.05076},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/210/}
}