Anwar, Saad, Afzal Anees, Nishat Afroz, and Sabiha Aziz. “H. Pylori and Peptic Ulcer Perforation: Prevalence of Infection and Role in Surgical Outcome”. International Surgery Journal 8, no. 4 (March 26, 2021): 1243–1246. Accessed November 10, 2025. https://www.ijsurgery.com/index.php/isj/article/view/7211.