Geodesic
Order unicyclic graphs according to spectral radius of unoriented laplacian matrix
Discussiones Mathematicae. Graph Theory, Tome 28 (2008) no. 3, pp. 487-499

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The spectral radius of a graph is defined by that of its unoriented Laplacian matrix. In this paper, we determine the unicyclic graphs respectively with the third and the fourth largest spectral radius among all unicyclic graphs of given order.
Keywords: unicyclic graph, Laplacian matrix, spectral radius 
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     title = {Order unicyclic graphs according to spectral radius of unoriented laplacian matrix},
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Fan, Yi-Zheng; Wu, Song. Order unicyclic graphs according to spectral radius of unoriented laplacian matrix. Discussiones Mathematicae. Graph Theory, Tome 28 (2008) no. 3, pp. 487-499. http://geodesic.mathdoc.fr/item/DMGT_2008_28_3_a8/