MA, YINGHIN; CHEN, LILY; LI, HENGZHE; LI, HAIFENG. The proper (Vertex) connection numbers of cubic graphs. Utilitas Mathematica , [S. l.], v. 102, 2017. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/1238. Acesso em: 7 may. 2026.