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B. Lucic, S. Nikolic, N. Trinajstic, B. Zhou and S. I. Turk, “Sum-Connectivity Index,” In: I. Gutman and B. Furtula, Eds., Novel Molecular Structure Descriptors-Theory and Applications I, University of Kragujevac, Kragujevac, 2010, pp. 101-136.

has been cited by the following article:

• TITLE: On the Harmonic Index of Triangle-Free Graphs

  AUTHORS: Jianxi Liu

  KEYWORDS: Harmonic Index; Minimum Degree; Triangle-Free

  JOURNAL NAME: Applied Mathematics, Vol.4 No.8, August 6, 2013

  ABSTRACT: The harmonic index of a graphG is defined as where d(u) denotes the degree of a vertex u in G . In this work, we give another expression for the Harmonic index. Using this expression, we give the minimum value of the harmonic index for any triangle-free graphs with order n and minimum degree δ ≥ k for k≤ n/2 and show the corresponding extremal graph is the complete graph.