ANIVERSARIO, IMELDA S.; JAMIL, FERDINAND P.; CANOY JR., SERGIO R. The closed geodetic numbers of graphs. Utilitas Mathematica , [S. l.], v. 74, 2007. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/456. Acesso em: 9 jul. 2026.