Geodesic
Bounds for the distance energy of a graph
Kragujevac Journal of Mathematics, Tome 31 (2008) no. 1.

Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

The distance energy of a graph $G$ is defined as the sum of the absolute values of the eigenvalues of the distance matrix of $G$. Recently bounds for the distance energy of a graph of diameter 2 were determined. In this paper we obtain bounds for the distance energy of any connected graph $G$ , thus generalizing the earlier results. 
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     author = {Harishchandra S. Ramane and Deepak S. Revankar and Ivan Gutman and Siddani Bhaskara Rao and B. Devadas Acharya and Hanumappa B. Walikar},
     title = {Bounds for the distance energy of a graph},
     journal = {Kragujevac Journal of Mathematics},
     pages = {59 - 68},
     publisher = {mathdoc},
     volume = {31},
     number = {1},
     year = {2008},
     zbl = {1199.05239},
     url = {http://geodesic.mathdoc.fr/item/KJM_2008_31_1_a5/}
}
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Harishchandra S. Ramane; Deepak S. Revankar; Ivan Gutman; Siddani Bhaskara Rao; B. Devadas Acharya; Hanumappa B. Walikar. Bounds for the distance energy of a graph. Kragujevac Journal of Mathematics, Tome 31 (2008) no. 1. http://geodesic.mathdoc.fr/item/KJM_2008_31_1_a5/