WU, RENFANG; TANG, ZIKAI; DENG, HANYUAN. On the harmonic index and the girth of a graph. Utilitas Mathematica , [S. l.], v. 91, 2013. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/970. Acesso em: 9 jul. 2026.