1. Cancer of the endocrine system;Norton,1989
2. Neuroendocrine tumors: a European view;Buchanan;Am J Med,1986
3. Pancreatic endocrine tumors;Jensen,1991
4. The Zollinger-Ellison syndrome;Stadil;Clin Endocrinol Metab,1979
5. Nonfunctioning islet cell tumors;Dent;Ann Surg,1981