KHAN, B. I. .; WARIS, H. .; AMIR, A. .; NAZIR, A. .; KHAN, A. .; ALI, Q. . Frequency of Helicobacter pylori (H. pylori) in Patients Operated for Duodenal Ulcer Perforation. Biological and Clinical Sciences Research Journal, [S. l.], v. 6, n. 8, p. 121–124, 2025. DOI: 10.54112/bcsrj.v6i8.2186. Disponível em: https://www.bcsrj.com/ojs/index.php/bcsrj/article/view/2186. Acesso em: 22 mar. 2026.