[1] A.R. Ashrafi, T. Došlić, and A. Hamzeh, The Zagreb coindices of graph operations, Discrete Appl. Math. 158 (2010), no. 15, 1571–1578.
[2] M. Azari and F. Falahati-Nezhed, Some results on forgotten topological coindex, Iranian J. Math. Chem. 10 (2019), no. 4, 307–318.
[3] R. Cruz, I. Gutman, and J. Rada, Sombor index of chemical graphs, Appl. Math. Comput. 399 (2021), ID: 126018.
[4] K.C. Das, A.S. Çevik, I.N. Cangul, and Y. Shang, On sombor index, Symmetry 13 (2021), no. 1, ID: 140.
[5] N. De, S. Nayeem, M. Abu, and A. Pal, The F-coindex of some graph operations, Springer Plus 5 (2016), no. 1, Art: 221.
[6] T. Došlić, Vertex-weighted Wiener polynomials for composite graphs, Ars Math. Contemp. 1 (2008), no. 1, 66–80.
[7] S.S. Dragomir, A survey on Cauchy-Bunyakovsky-Schwarz type discrete inequalities, J. Inequal. Pure Appl. Math. 4 (2003), no. 3, Art. 63.
[8] S. Filipovski, Relations between Sombor index and some degree-based topological
indices, Iranian J. Math. Chem. 12 (2021), no. 1, 19–26.
[9] I. Gutman, Geometric approach to degree-based topological indices: Sombor indices, MATCH Commun. Math. Comput. Chem. 86 (2021), no. 1, 11–16.
[10] I. Gutman, N.K. Gürsoy, A. Gürsoy, and A. Ülker, New bounds on sombor index, Commun. Comb. Optim. (In press).
[11] D.J. Klein, T. Došlić, and D. Bonchev, Vertex-weightings for distance moments and thorny graphs, Discrete Appl. Math. 155 (2007), no. 17, 2294–2302.
[12] X. Li and J. Zheng, A unified approach to the extremal trees for different indices, MATCH Commun. Math. Comput. Chem. 54 (2005), no. 1, 195–208.
[13] I. Milovanović, M. Matejić, E. Milovanović, and R. Khoeilar, A note on the first Zagreb index and coindex of graphs, Commun. Comb. Optim. 6 (2021), no. 1, 41–51.
[14] C. Phanjoubam and S.Mn. Mawiong, On Sombor index and some topological indices, Iranian J. Math. Chem. 12 (2021), no. 4, 209–215.
[15] H.S. Ramane, I. Gutman, K. Bhajantri, and D.V. Kitturmath, Sombor index of some graph transformations, Commun. Comb. Optim. (In press).
[16] I. Redžepović, Chemical applicability of Sombor indices, J. Serb. Chem. Soc. 86 (2021), no. 5, 445–457.
[17] T. Réti, T. Došlić, and A. Ali, On the sombor index of graphs, Contrib. Math. 3 (2021), 11–18.
[18] N.H.A.M. Saidi, M.N. Husin, and N.B. Ismail, Zagreb indices and Zagreb coindices of the line graphs of the subdivision graphs, J. Discrete Math. Sci. Cryptogr. 23 (2020), no. 6, 1253–1267.
[19] Z. Wang, Y. Mao, Y. Li, and B. Furtula, On relations between Sombor and other degree-based indices, J. Appl. Math. Comput. 68 (2022), no. 1, 1–17.
[20] H. Wiener, Structural determination of paraffin boiling points, J. Am. Chem. Soc. 69 (1947), no. 1, 17–20.