KATHIRESAN KM.; GOKULAKRISHNAN S. On magic labelings of type (1,1,1) for the special classes of plane graphs. Utilitas Mathematica , [S. l.], v. 63, 2003. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/305. Acesso em: 8 may. 2026.