Howgego, Greg, and Dominic Howard. “The Challenges of Diagnosing and Managing a Ruptured Abdominal Aortic Aneurysm With Primary Aortoduodenal Fistula”. Journal of the Nuffield Department of Surgical Sciences, vol. 2, no. 3, Aug. 2021, https://jnds.migration.pkpps03.publicknowledgeproject.org/index.php/JNDS/article/view/108.