TEAM, S. Valuation $\tau$-Semirings and Valuation $\tau$-Ideals: S. Sangwirotjanapat, S. Tipyota, S. Pianskool. Thai Journal of Mathematics, [S. l.], v. 6, n. 3, p. 93–102, 2008. Disponível em: https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/138. Acesso em: 17 may. 2024.