LIU, MUHUO; LIU, BOLIAN; TAN, XUEZHONG. The first to ninth greatest LEL-invariants of connected graphs. Utilitas Mathematica , [S. l.], v. 93, 2014. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/1067. Acesso em: 9 jul. 2026.