AINGWORTH, DONALD; MOTWANI, RAJEEV; HARARY, FRANK. The difference between a graph and its square. Utilitas Mathematica , [S. l.], v. 54, 1998. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/79. Acesso em: 8 may. 2026.