SAMIT, Kumar Majumder; SUJIT, Kumar Sardar. On properties of fuzzy ideals in po-semigroup. Armenian Journal of Mathematics, Yerevan, Armenia, v. 2, n. 2, p. 65–72, 2009. Disponível em: https://armjmath.sci.am/index.php/ajm/article/view/53. Acesso em: 3 apr. 2025.