Sombor indices of molecular graphs and some derived graphs of V -phenylenic nanotubes and nanotori. Journal of Prime Research in Mathematics, [S. l.], v. 19, n. 1, p. 14 – 26, 2023. Disponível em: https://jprm.sms.edu.pk/index.php/jprm/article/view/204. Acesso em: 6 apr. 2026.