LU, PENGLI; GUO, XUDONG. The Hyper-Zagreb index and F-index of five kinds of graphs. Utilitas Mathematica , [S. l.], v. 115, 2020. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/1489. Acesso em: 26 sep. 2026.