FENG, XINYANG; TANG, JIAN; LUO, YANFENG. Further studies on ordered (*, Γ)-semigroups. Utilitas Mathematica , [S. l.], v. 115, 2020. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/1490. Acesso em: 7 may. 2026.