حسان زيزفون. “بعض سمات القرحة الاثنى عشرية في سورية”. Tishreen University Journal -Medical Sciences Series 24, no. 13 (October 9, 2023). Accessed May 13, 2024. https://journal.tishreen.edu.sy/index.php/hlthscnc/article/view/16173.