1. Aghajani, M.: $$N$$-pure ideals and mid rings. Bull. Korean Math. Soc. 59(5), 1237–1246 (2022)
2. Al-Ezeh, H.: The pure spectrum of a PF-ring. Comment. Math. Univ. St. Paul. 37(2), 179–183 (1988)
3. Anderson, D.D., Winders, M.: Idealization of a module. J. Commut. Algebra 1, 3–56 (2009)
4. Arnold, J.T., Gilmer, R., Heinzer, W.: Some countability conditions in a commutative ring. Ill. J. Math. 21(3), 648–665 (1977)
5. Benhissi, A.: Les anneaux des séries formelles. In: Queen’s Papers in Pure and Applied Mathematics, vol. 124. Queen’s University, Kingston, ON (2003)