FENG, LIHUA; LIU, WEIJUN; XU, KEXIANG. The hyper-Wiener index of bicyclic graphs. Utilitas Mathematica , [S. l.], v. 84, 2011. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/813. Acesso em: 8 may. 2026.