@article{10_37236_638,
     author = {F. M. Dong and Gordon Royle and Dave Wagner},
     title = {Chromatic roots of a ring of four cliques},
     journal = {The electronic journal of combinatorics},
     year = {2011},
     volume = {18},
     number = {1},
     doi = {10.37236/638},
     zbl = {1222.05054},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/638/}
}