Feng Ming Dong, Khee Meng Koh. The 3-connectivity of a graph and the multiplicity of zero "2" of its chromatic polynomial. Journal of Graph Theory, 70(3):262-283, 2012. [doi]
@article{DongK12,
title = {The 3-connectivity of a graph and the multiplicity of zero "2" of its chromatic polynomial},
author = {Feng Ming Dong and Khee Meng Koh},
year = {2012},
doi = {10.1002/jgt.20614},
url = {http://dx.doi.org/10.1002/jgt.20614},
researchr = {https://researchr.org/publication/DongK12},
cites = {0},
citedby = {0},
journal = {Journal of Graph Theory},
volume = {70},
number = {3},
pages = {262-283},
}