jabar, Darya, and Saad Abdulkadhim Al-Saad. “Strongly N-Extending Strongly N-Extending Modules”. Al-Qadisiyah Journal of Pure Science 26, no. 4 (August 10, 2021): 293–301. Accessed May 7, 2024. https://journalsc.qu.edu.iq/index.php/JOPS/article/view/1350.