@article{10_4153_CMB_1971_018_1,
     author = {Ballard, David},
     title = {Coloring a {Dodecahedron} with {Four} {Colors(1)}},
     journal = {Canadian mathematical bulletin},
     pages = {103--105},
     year = {1971},
     volume = {14},
     number = {1},
     doi = {10.4153/CMB-1971-018-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1971-018-1/}
}