T. . j. M. Al marzooq, “Diagnostic Accuracy of Different Radiological Investigations in the Diagnosis of Perforated Duodenal Ulcer”, Al-Kindy Col. Med. J, vol. 8, no. 1, pp. 83–87, Jun. 2012, Accessed: Apr. 30, 2025. [Online]. Available: https://www.jkmc.uobaghdad.edu.iq/index.php/MEDICAL/article/view/617