@article{CMJ_2009__59_4_a4,
     author = {Okamoto, Futaba and Rasmussen, Craig W. and Zhang, Ping},
     title = {Set vertex colorings and joins of graphs},
     journal = {Czechoslovak Mathematical Journal},
     pages = {929--941},
     publisher = {mathdoc},
     volume = {59},
     number = {4},
     year = {2009},
     mrnumber = {2563567},
     zbl = {1224.05184},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2009__59_4_a4/}
}