@article{10_37236_1437,
     author = {Yair Caro and Raphael Yuster},
     title = {Orthogonal colorings of graphs},
     journal = {The electronic journal of combinatorics},
     year = {1999},
     volume = {6},
     doi = {10.37236/1437},
     zbl = {0909.05026},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1437/}
}