KAYAALP, Cüneyt, Sezai YILMAZ, and Bora MUTLU. “MARGINAL ULCER PERFORATIONS”. Turkish Journal of Gastroenterology 4, no. 3 (January 3, 1993): 558–560. Accessed January 1, 2026. https://www.turkjgastroenterol.org/index.php/tjg/article/view/302.