E. L. Gorbachuk and Y. P. Maturin, “$I$-Radicals, Their Lattices, and Some Classes of Rings”, Ukr. Mat. Zhurn., vol. 54, no. 7, pp. 1016–1019, Jul. 2002, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4141