Hammood, Emad Kh. “Percutaneous Endoscopic Spinal Surgery for Lumbar Disc Prolapse in Erbil City of Iraq: A Study on 60 Patients”. Diyala Journal of Medicine, vol. 15, no. 2, Dec. 2018, pp. 1-8, https://www.djm.uodiyala.edu.iq/index.php/djm/article/view/170.