TEAM, S. Outermost-Strongly Solid Variety of Commutative Semigroups: Sorasak Leeratanavalee. Thai Journal of Mathematics, [S. l.], v. 14, n. 2, p. 305–313, 2016. Disponível em: https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/598. Acesso em: 18 may. 2024.