Acharya, Metesh Nalin, Nikolaos Panagiotopoulos, Patrizia Cohen, Raida Ahmad, and Long R Jiao. “Poorly-Differentiated Signet-Ring Cell Carcinoma of the Ampulla of Vater: Report of a Rare Malignancy”. JOP. Journal of the Pancreas 14, no. 2 (March 10, 2013): 190–194. Accessed May 3, 2025. https://serena.sharepress.it/index.php/jop/article/view/1267.