FENG, LIHUA; YU, GUIHAI; LIU, WEIJUN. The hyper-Wiener index of graphs with a given chromatic (clique) number. Utilitas Mathematica , [S. l.], v. 88, 2012. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/876. Acesso em: 8 may. 2026.