@article{M2AN_1971__5_3_3_0,
     author = {de Werra, D.},
     title = {Equitable colorations of graphs},
     journal = {Revue fran\c{c}aise d'informatique et de recherche op\'erationnelle. S\'erie rouge},
     pages = {3--8},
     publisher = {Dunod},
     address = {Paris},
     volume = {5},
     number = {R3},
     year = {1971},
     mrnumber = {543812},
     zbl = {0239.05112},
     language = {en},
     url = {http://www.numdam.org/item/M2AN_1971__5_3_3_0/}
}