Sciumè, C., G. Geraci, F. Pisello, F. Li Volsi, T. Facella, and G. Modica. 2005. “Heterotopic Gastric Mucosa in the Gallbladder: Case Report and Literature Review”. Annali Italiani Di Chirurgia 76 (1):93-97. https://annaliitalianidichirurgia.it/index.php/aic/article/view/1226.