FATH-TABAR G.H.; HOSSEIN-ZADEH S.; HAMZEH A. On the first geometric-arithmetic index of product graphs. Utilitas Mathematica , [S. l.], v. 86, 2011. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/740. Acesso em: 17 apr. 2026.