SONGÜR, Yıldıran, Himmet KARACA, and Sadun KOŞAY. “Changes in Cardiac Rhythm During Gastroscopy”. Turkish Journal of Gastroenterology 6, no. 2 (January 2, 1995): 253–255. Accessed January 1, 2026. https://turkjgastroenterol.org/index.php/tjg/article/view/620.