Z Shao, P Wu, Y Gao, I Gutman, X Zhang - Applied Mathematics and …, 2017 - Elsevier
Let G be a simple graph. The atom–bond connectivity index (ABC) of G is defined as ABC
(G)=∑ uv∈ E (G) d (u)+ d (v)− 2 d (u) d (v), where d (v) denotes the degree of vertex v of G …