FORBES A.D.; GRANNELL M.J.; GRIGGS T.S.; STANTON R.G. On the small covering numbers g1(5) (v). Utilitas Mathematica , [S. l.], v. 74, 2007. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/470. Acesso em: 9 jul. 2026.