OGULIN, Mateja; JAMAR, Breda. Annular pancreas causing extrahepatic biliary obstruction. Radiology and Oncology, [S. l.], v. 38, n. 4, 2004. Disponível em: https://www.radioloncol.com/index.php/ro/article/view/1322. Acesso em: 23 may. 2026.