We discuss the chromaticity of one family of \(K_4\)-homeomorphs which has girth \(7\) and has exactly \(1\) path of length \(1\), and give a sufficient and necessary condition for the graphs in the family to be chromatically unique.
Citation
Yan-Ling Peng. A Family of Chromatically Unique \(K_4\)-Homeomorphs[J], Ars Combinatoria, Volume 105. 491-502. .