1. Babkin, B. P., “Secretory Mechanism of the Digestive Glands” (Paul B. Hoeber, Inc., New York, 1950).
2. Koelle, G. B., and Friedenwald, J. S., Proc. Soc. Exp. Biol. Med., 70, 617 (1949).
3. Cöers, C., Arch. Biol., 64, 133 (1953).
4. Koelle, G. B., J. Pharmacol. and Exp. Therap., 114, 167 (1955).