Greca, Gaetano La, Emanuele Grasso, Maria Sofia, Salvina Gagliardo, and Francesco Barbagallo. 2008. “Complicated Duodeno-Biliary Fistula in Bleeding Duodenal Ulcer: Case Report an Literature Review”. Annali Italiani Di Chirurgia 79 (1):57-61. https://annaliitalianidichirurgia.it/index.php/aic/article/view/609.