Jaber, Azeez Lafta, and Shuker Mahmood Khalil. “New Classes of Filters in Delta-Algebras”. Iraqi Journal of Science 65, no. 8 (August 30, 2024): 4411–4418. Accessed July 5, 2026. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/8857.