Ren, Haizhen; Gao, Yanling On the minimum roots of the adjoint polynomials of unicyclic graphs. (English) Zbl 1299.05179 J. Math. Study 46, No. 4, 388-394 (2013). MSC: 05C31 05C15 PDFBibTeX XMLCite \textit{H. Ren} and \textit{Y. Gao}, J. Math. Study 46, No. 4, 388--394 (2013; Zbl 1299.05179)
Ren, Haizhen; Liu, Rujing Methods for constructing the chromatically equivalent graphs. (Chinese. English summary) Zbl 1199.05129 J. Lanzhou Univ., Nat. Sci. 44, No. 1, 115-117 (2008). MSC: 05C15 05C31 05C75 PDFBibTeX XMLCite \textit{H. Ren} and \textit{R. Liu}, J. Lanzhou Univ., Nat. Sci. 44, No. 1, 115--117 (2008; Zbl 1199.05129)
Ren, Haizhen; Liu, Ruying On the minimum real roots of the adjoint polynomials of graphs. (English) Zbl 1199.05176 J. Math. Res. Expo. 28, No. 4, 987-993 (2008). MSC: 05C31 05C15 PDFBibTeX XMLCite \textit{H. Ren} and \textit{R. Liu}, J. Math. Res. Expo. 28, No. 4, 987--993 (2008; Zbl 1199.05176) Full Text: DOI