Matthias Beck, Mela Hardin. A Bivariate Chromatic Polynomial for Signed Graphs. Graphs and Combinatorics, 31(5):1211-1221, 2015. [doi]
@article{BeckH15,
title = {A Bivariate Chromatic Polynomial for Signed Graphs},
author = {Matthias Beck and Mela Hardin},
year = {2015},
doi = {10.1007/s00373-014-1481-6},
url = {http://dx.doi.org/10.1007/s00373-014-1481-6},
researchr = {https://researchr.org/publication/BeckH15},
cites = {0},
citedby = {0},
journal = {Graphs and Combinatorics},
volume = {31},
number = {5},
pages = {1211-1221},
}