S. Catada-Ghimire and R. Hasni, New result on chromaticity of $K_4$-homeomorphic graphs, Int. J. Comput. Math. 91 (2014), no. 5, 834--843.
S. Catada-Ghimire, R. Hasni, and Y.H. Peng, Chromatically equivalent pairs of $K_4$-homeomorphic graphs, Acta Math. Appl. Sin. Engl. Ser. 2010 (2010) DOI: 10.1007/s10255-010-0034-x, 8 pages.
C.Y. Chao and L.C. Zhao, Chromatic polynomials of a family of graphs, Ars Combin. 15 (1983) 111--129.
X.E. Chen and K.Z. Ouyang, Chromatic classes of certain 2-connected (n,n+2)-graphs homeomorphs to $K_4$, Discrete Math. 172 (1997), no. 1-3, 17--29.
F.M. Dong, K.M. Koh and K.L. Teo, Chromatic Polynomials and Chromaticity of Graphs, World Scientific Publishing, Hackensack, NJ, 2005.
Z.Y. Guo and E.G. Whitehead Jr., Chromaticity of a family of $K_4$-homeomorphs, Discrete Math. 172 (1997), no. 1-3, 53--58.
R. Hasni, Chromatic equivalence of a family of $K_4$-homeomorphs with girth 9, Int. J. Pure Appl. Math. 85 (2013), no. 1, 33--43.
N.S.A. Karim, R. Hasni and G.C. Lau, Chromaticity of a family of $K_4$-homeomorphs with girth 9, AIP Conf. Proc. 1605 (2014) 563--567.
N.S.A. Karim, R. Hasni and G.C. Lau, Chromaticity of a family of $K_4$-homeomorphs with girth 9 II, Malays. J. Math. Sci. 9 (2015), no. 3, 367--396.
K.M. Koh and K.L. Teo, The search for chromatically unique graphs, Graphs Combin. 6 (1990), no. 3, 259--285.
K.M. Koh and K.L. Teo, The search for chromatically unique graphs, II, Discrete Math. 172 (1997), no. 1-3, 59--78.
W.M. Li, Almost every $K_4$-homeomorphs is chromatically unique, Ars Combin. 23 (1987) 13--35.
Y.L. Peng, Some new results on chromatic uniqueness of $K_4$-homeomorphs, Discrete Math. 228 (2004), no. 1-3, 177--183.
Y.L. Peng, Chroatic uniqueness of a family of $K_4$-homeomorphs, Discrete Math. 308 (2008), no. 24, 6132--6140.
Y.L. Peng, A family of chromatically unique $K_4$-homeomorphs, Ars Combin. 105 (2012) 491--502.
Y.L. Peng and R.Y. Liu, Chromaticity of a family of $K_4$-homeomorphs, Discrete Math. 258 (2002), no. 1-3, 161--177.
H.Z. Ren, On the chromaticity of $K_4$ homeomorphs, Discrete Math. 252 (2002), no. 1-3, 247--257.
W. Shi, On the Critical Group and Chromatic Uniqueness of a Graph, Master Thesis, University of Science and Technology of China, P.R. China, 2011.
W. Shi, Y.I. Pan and Y. Zhao, Chromatic uniqueness of $K_4$-homeomorphs with girth 8, J. Math. Res. Appl. 32 (2012), no. 3, 269--280.
E.G. Whitehead Jr. and L.C. Zhao, Chromatic uniqueness and equivalence of $Ksb 4 $ homeomorphs, J. Graph Theory 8 (1984), no. 3, 355--364.
S. Xu, A lemma in studying chromaticity, Ars Combin. 32 (1991) 315--318.
S. Xu, Chromaticity of a family of $K_4$-homeomorphs, Discrete Math. 117 (1993), no. 1-3, 293--297.