TEAM, S. Regular Transformation Semigroups on Some Dictionary Chains: W. Mora, Y. Kemprasit. Thai Journal of Mathematics, [S. l.], v. 5, n. 3, p. 87–93, 2007. Disponível em: https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/105. Acesso em: 5 may. 2024.