John, Binni, Bipin P. Mathew, and Vipin Chandran C. “Prevalence of Helicobacter Pylori in Peptic Ulcer Perforation”. International Surgery Journal 4, no. 10 (September 27, 2017): 3350–3353. Accessed May 1, 2026. https://www.ijsurgery.com/index.php/isj/article/view/2066.