VOLKMANN, LUTZ. Nordhaus-gaddum type results for domination sums in graphs with minimum degree at least four, five or six. Utilitas Mathematica , [S. l.], v. 85, 2011. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/764. Acesso em: 8 may. 2026.