H.A. Al-Zubaydi, Jaffar. 2018. “Rock Slopes Stability Analysis Of AL-Nfayil Formation at Bahr Al-Najaf Basin -Middle of Iraq:Case Study”. Al-Qadisiyah Journal of Pure Science 22 (2), 254-76. https://journalsc.qu.edu.iq/index.php/JOPS/article/view/572.