BHAT, V. K. Minimal prime ideals of $\sigma(*)$-rings and their extensions. Armenian Journal of Mathematics. Armenian Journal of Mathematics, Yerevan, Armenia, v. 5, n. 2, p. 98–104, 2014. Disponível em: https://armjmath.sci.am/index.php/ajm/article/view/93. Acesso em: 19 apr. 2025.