N. O. Machado, P. J. Chopra, I. H. Al-Haddabi, and H. Al-Qadhi, “Large Duodenal Gastrointestinal Stromal Tumor Presenting with Acute Bleeding Managed by a Whipple Resection. A Review of Surgical Options and the Prognostic Indicators of Outcome”, JOP. J Pancreas (Online), vol. 12, no. 2, pp. 194–199, Mar. 2011.