C. Adiga and B.R. Rakshith, Upper bounds for the extended energy of graphs and some extended equienergetic graphs, Opuscula Math. 38 (2018), no. 1, 5–13.
 G. Arizmendi and O. Arizmendi, Energy of a graph and Randić index, Lin. Algebra. Appl. 609 (2021), 332–338.
 D. Cvetković, M. Doob, and H. Sachs, Spectra of Graphs, Academic Press, New York, 1980.
 K.C. Das, On the Zagreb energy and Zagreb Estrada index of graphs, MATCH Commun. Math. Comput. Chem. 82 (2019), no. 2, 529–542.
 K.C. Das, I. Gutman, and B. Furtula, On spectral radius and energy of extended adjacency matrix of graphs, Appl. Math. Comput. 296 (2017), 116–123.
 K.C. Das, I. Gutman, I. Milovanović, E. Milovanović, and B. Furtula, Degreebased energies of graphs, Lin. Algebra. Appl. 554 (2018), 185–204.
 I. Gutman, Degree-based topological indices, Croat. Chem. Acta 86 (2013), no. 4, 351–361.
 I. Gutman and K.C. Das, The first Zagreb index 30 years after, MATCH Commun. Math. Comput. Chem. 50 (2004), no. 1, 83–92.
 I. Gutman, S. Filipovski, and R. Jajcay, Variations on McClelland’s bound for graph energy, Discrete Math. Lett. 3 (2020), 57–60.
 I. Gutman and H. Ramane, Research on graph energies in 2019, MATCH Commun. Math. Comput. Chem. 84 (2020), no. 2, 277–292.
 R.A. Horn and C.R. Johnson, Matrix Analysis, Cambridge Univ. Press, New York, 1990.
 W. Imrich and S. Klavžar, Product of Graphs - Structure and Recognition, Wiley, New York, 2000.
 N. Jafari Rad, A. Jahanbani, and I. Gutman, Zagreb energy and Zagreb Estrada index of graphs, Match. Commun. Math. Comput. Chem. 79 (2018), 371–386.
 X. Li and Y. Shi, A survey on the Randić index, MATCH Commun. Math. Comput. Chem. 59 (2008), no. 1, 127–156.
 X. Li, Y. Shi, and I. Gutman, Graph Energy, Springer, New York, 2012.
 A.W. Marshall, I. Olkin, and B.C. Arnold, Inequalities: Theory of Majorization and its Applications, Springer, New York, 2011.
 F. Zhan, Y. Qiao, and J. Cai, On edge-Zagreb spectral radius and edge-Zagreb energy of graphs, Linear and Multilinear Algebra 66 (2018), no. 12, 2512–2523.