KARA, B. (1993) “BLOOD CA19-9 LEVELS, ENDOSCOPIC APPEARANCE, HISTOPATHOLOGIC EVALUATION OF BIOPSIES FROM EDGE AND AROUND MUCOSA IN GASTRIC ULCERS”, Turkish Journal of Gastroenterology, 4(4), pp. 648–649. Available at: https://www.turkjgastroenterol.org/index.php/tjg/article/view/362 (Accessed: 1 January 2026).