ABDO, H.; DIMITROV, D.; GUTMAN, I. On extremal trees with respect to the F-index. Kuwait Journal of Science, [S. l.], v. 44, n. 3, 2017. Disponível em: https://journalskuwait.org/kjs/index.php/KJS/article/view/1616. Acesso em: 28 apr. 2026.