[1] J. A. Bondy and U. S. R. Murty, Graph Theory, Springer, London, 2008.
[2] M. Randic, The connectivity index 25 years after, J. Mol. Graphics Modell. 20 (2001) 19–35.
[3] M. Randic, Characterization of molecular branching, J. Am. Chem. Soc. 97 (1975) 6609–6615.
[4] J. Zhang and B. Wu, Randic index of a line graph, Axioms 11 (2022) #3210, https://doi.org/10.3390/axioms11050210.
[5] D. Vukicevic and B. Furtula, Topological index based on the ratios of geometrical and arithmetical means of end-vertex degrees of edges, J. Math. Chem. 46 (2009) 1369–1376.
[6] S. Moon and S. Park, Bounds for the geometric-arithmetic index of unicyclic graphs, J. Appl. Math. Comput. 69 (2023) 2955–2971, https://doi.org/10.1007/s12190-023-01864-w.
[7] V. S. Shegehalli and R. Kanabur, Arithmetic-geometic indices of path graph, J. Math. Comput. Sci. 16 (2015) 19–24.
[8] Z. K. Vukicevic, S. Vujoševic and G. Popivoda, Unicyclic graphs with extremal values of arithmetic-geometric index, Discrete Appl. Math. 302 (2021) 67–75, https://doi.org/10.1016/j.dam.2021.06.009.
[9] M. Aouchiche and P. Hansen, The geometric–arithmetic index and the chromatic number of connected graphs, Discrete Appl. Math. 232 (2017) 207–212, https://doi.org/10.1016/j.dam.2017.08.003.
[10] Y. Chen and B. Wu, On the geometric-arithmetic index of a graph, Discrete Appl. Math. 254 (2019) 268–273, https://doi.org/10.1016/j.dam.2018.06.021.
[11] M. Bianchi, A. Cornaro, J. L. Palacios and A. Torriero, Lower bounds for the geometricarithmetic index of graphs with pendant and fully connected vertices, Discrete Appl. Math. 257 (2019) 53–59, https://doi.org/10.1016/j.dam.2018.10.024.
[12] M. Aouchiche, I. E. Hallaoui and P. Hansen, Geometric-arithmetic index and minimum degree of connected graphs, MATCH Commun. Math. Comput. Chem. 83 (2020) 179–188.
[13] I. Gutman, Relation between geometric-arithmetic and arithmetic-geometric indices, J. Math. Chem. 59 (2021) 1520–1525, https://doi.org/10.1007/s10910-021-01256-0.
[14] S. Bermudo, Upper bound for the geometric-arithmetic index of trees with given domination number, Discrete Math. 346 (2023) #113172, https://doi.org/10.1016/j.disc.2022.113172.
[15] S. Bermudo, R. Hasni, F. Movahedi and J. E. Nápoles, The geometric–arithmetic index of trees with a given total domination number, Discrete Appl. Math. 345 (2024) 99–113, https://doi.org/10.1016/j.dam.2023.11.024.
[16] V. S. Shegehalli and R. Kanabur, Arithmetic-geometric indices of some class of graph, J. Comput. Math. Sci. 6 (2015) 194–199.
[17] E. D. Molina, J. M. Rodríguez, J. L. Sánchez and J. M. Sigarreta, Some properties of the arithmetic–geometric index, Symmetry 13 (2021) #857, https://doi.org/10.3390/sym13050857.
[18] G. Li and M. Zhang, Sharp bounds on the arithmetic–geometric index of graphs and line graphs, Discrete Appl. Math. 318 (2022) 47–60,
https://doi.org/10.1016/j.dam.2022.05.006.
[19] B. Niu, S. Zhou and H. Zhang, Extremal arithmetic–geometric index of bicyclic graphs, Circuits Syst. Signal Process. 42 (2023) 5739–5760, https://doi.org/10.1007/s00034-023-02385-4.
[20] A. M. Albalahi, A. Ali, A. M. Alanazi, A. A. Bhatti and A. E. Hamza, Harmonic–arithmetic index of (molecular) trees, Contrib. Math. 7 (2023) 41–47, https://doi.org/10.47443/cm.2023.008.
[21] J. Du and X. Sun, On bond incident degree index of chemical trees with a fixed order and a fixed number of leaves, Appl. Math. Comput. 464 (2024) #128390, https://doi.org/10.1016/j.amc.2023.128390.
[22] A. M. Albalahi, D. Dimitrov, T. Réti, A. Ali and S. Hussain, Bond incident degree indices of connected (n,m)-graphs with fixed maximum degree, MATCH Commun. Math. Comput. Chem. 92 (2024) 607–630,
https://doi.org/10.46793/match.92 2.607A.
[23] A. Ali, E. Milovanovic, S. Stankov, M. Matejic and I. Milovanovic, Inequalities involving the harmonic-arithmetic index, Afr. Mat. 35 (2024) #46, https://doi.org/10.1007/s13370-024-01183-8.
)