@article{10_21136_MB_2009_140654,
     author = {Chartrand, Gary and Okamoto, Futaba and Salehi, Ebrahim and Zhang, Ping},
     title = {The multiset chromatic number of a graph},
     journal = {Mathematica Bohemica},
     pages = {191--209},
     publisher = {mathdoc},
     volume = {134},
     number = {2},
     year = {2009},
     doi = {10.21136/MB.2009.140654},
     mrnumber = {2535147},
     zbl = {1212.05071},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2009.140654/}
}