@article{ITA_1974__8_1_49_0,
     author = {De Werra, D.},
     title = {A note on graph coloring},
     journal = {Revue fran\c{c}aise d'automatique informatique recherche op\'erationnelle. Informatique th\'eorique},
     pages = {49--53},
     publisher = {Dunod-Gauthier-Villars},
     address = {Paris},
     volume = {8},
     number = {R1},
     year = {1974},
     mrnumber = {340085},
     zbl = {0279.05105},
     language = {en},
     url = {http://archive.numdam.org/item/ITA_1974__8_1_49_0/}
}