TEAM, S. On Decompositions of Intra-Regular and Left Regular Ordered ?-Semigroups: Chong-Yih Wu. Thai Journal of Mathematics, [S. l.], v. 16, n. 3, p. 599–611, 2018. Disponível em: https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/817. Acesso em: 7 may. 2024.