Mahmoud Dogara Abdulrahman, Harmand A. Hama, and Saber W. Hamad. “Br”. Zanco Journal of Pure and Applied Sciences 34, no. 3 (June 15, 2022): 60–72. Accessed May 17, 2024. https://zancojournal.su.edu.krd/index.php/JPAS/article/view/174.