LEE, SIN-MIN; NG, HO KUEN; TONG, SIU-MING. On the balance index set of the chain-sum graphs of cycles. Utilitas Mathematica , [S. l.], v. 77, 2008. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/525. Acesso em: 8 may. 2026.