BLIDIA, MOSTAFA; CHELLALI, MUSTAPHA; VOLKMANN, LUTZ. Bounds of the 2-domination number of graphs. Utilitas Mathematica , [S. l.], v. 71, 2006. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/401. Acesso em: 20 apr. 2026.