1. Banting FG, Best CH (1922) The internal secretion of the pancreas. J Lab Clin Med 7: 251–266
2. Bayliss WM, Starling EH (1902) The mechanism of pancreatic secretion. J Physiol (Lond) 28: 325–353
3. Bloom SR, Polak JM (1981) Gut hormones: Churchill Livingston, London
4. Cooperstein SJ, Watkins D (1981) The islets of Langerhans — biochemistry, physiology, and pathology. Academic Press, New York
5. Ebe T, Kobayashi S (1972) Fine structure of human cells and tissues. Igaku Shoin, Tokyo