@article{DMTCS_2003_6_1_a4,
     author = {Dohmen, Klaus and Poenitz, Andr\'e and Tittmann, Peter},
     title = {A new two-variable generalization of the chromatic polynomial},
     journal = {Discrete mathematics & theoretical computer science},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {2003-2004},
     doi = {10.46298/dmtcs.335},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.46298/dmtcs.335/}
}