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Cioabă, Sebastian M.; Gu, Xiaofeng Connectivity, toughness, spanning trees of bounded degree, and the spectrum of regular graphs. (English) Zbl 1413.05222 Czech. Math. J. 66, No. 3, 913-924 (2016). MSC: 05C50 05C40 05C42 05C05 15A18 PDF BibTeX XML Cite \textit{S. M. Cioabă} and \textit{X. Gu}, Czech. Math. J. 66, No. 3, 913--924 (2016; Zbl 1413.05222) Full Text: DOI arXiv Link OpenURL
Cioabă, Sebastian M.; Wong, Wiseley The spectrum and toughness of regular graphs. (English) Zbl 1298.05200 Discrete Appl. Math. 176, 43-52 (2014). MSC: 05C50 05C35 05E30 05C69 PDF BibTeX XML Cite \textit{S. M. Cioabă} and \textit{W. Wong}, Discrete Appl. Math. 176, 43--52 (2014; Zbl 1298.05200) Full Text: DOI arXiv OpenURL
You, Zhifu; Liu, Bolian On the Laplacian spectral ratio of connected graphs. (English) Zbl 1248.05116 Appl. Math. Lett. 25, No. 10, 1245-1250 (2012). MSC: 05C50 05C40 PDF BibTeX XML Cite \textit{Z. You} and \textit{B. Liu}, Appl. Math. Lett. 25, No. 10, 1245--1250 (2012; Zbl 1248.05116) Full Text: DOI OpenURL