<p>Let G be any (molecular) graph. The hyper-Zagreb index of a graph was intro- duced and studied by G.H Shirdel and H.Rezapour. In this paper some exact expressions for the hyper-Zagreb index of four graph operations(F-sums) of a graph are established. ©2017 Academic Publications, Ltd.</p>
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Va Anandkumar and Dr. Radha Iyer R., “On the hyper-zagreb index of some operations on graphs”, International Journal of Pure and Applied Mathematics, vol. 112, pp. 239-252, 2017.