1. Primary duodenal tumors: A study of 31 cases;Charles;Arch Intern Med,1963
2. Carcinoid tumors of the gastrointestinal tract;Morgan;Ann Surg,1974
3. Pimary duodenal carcinoid with malignant carcinoid syndrome: A case report;Gutman;Am J Gastroenterol,1986
4. Duodenal carcinoid tumor: Endosonographic imaging and endoscopic resection;Yoshikane;Am J Gastroenterol,1995
5. Primary duodenal carcinoid;Wengrower;Am J Gastroenterol,1987