Geodesic
The Wiener number of Kneser graphs
Discussiones Mathematicae. Graph Theory, Tome 28 (2008) no. 2, pp. 219-228

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The Wiener number of a graph G is defined as 1/2∑d(u,v), where u,v ∈ V(G), and d is the distance function on G. The Wiener number has important applications in chemistry. We determine the Wiener number of an important family of graphs, namely, the Kneser graphs.
Keywords: Wiener number, Kneser graph, odd graph 
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Balakrishnan, Rangaswami; Raj, S. The Wiener number of Kneser graphs. Discussiones Mathematicae. Graph Theory, Tome 28 (2008) no. 2, pp. 219-228. http://geodesic.mathdoc.fr/item/DMGT_2008_28_2_a1/