TÜRKDOĞAN, M. K. (1999) “Nitric oxide oxidation products in the serum of patients with gastric and esophageal cancer and Helicobacter pylori”, Turkish Journal of Gastroenterology, 10(3), pp. 193–196. Available at: https://www.turkjgastroenterol.org/index.php/tjg/article/view/989 (Accessed: 1 January 2026).