Yoshihiro, Hamada, Maeshiro Kensei, and Nakayama Yoshifuku. “Endoscopic Papillectomy for Carcinoma of the Ampulla of Vater: Possible Standardization Based on Endoscopy and Immunohistochemistry”. Turkish Journal of Gastroenterology 25, no. 5 (January 5, 2014): 563–567. Accessed January 1, 2026. https://turkjgastroenterol.org/index.php/tjg/article/view/2581.