Kara, Yeliz. “Projection Invariant $t$-Baer and Related Modules”. Ukrains’kyi Matematychnyi Zhurnal 75, no. 10 (October 24, 2023): 1354–1365. Accessed December 5, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/7244.