1. Tranzer, J. P., Da Prada, M., and Pletscher, A., Nature, 212, 1574 (1966).
2. Tranzer, J. P., Pletscher, A., and Da Prada, M., Helv. Physiol. Acta, 24, C108 (1966).
3. Da Prada, M., Tranzer, J. P., and Pletscher, A., J. Pharmacol. Exp. Therap (in the press).
4. Tranzer, J. P., Da Prada, M., and Pletscher, A., in Advances in Pharmacology (Academic Press, in the press).
5. Bak, I. J., Hassler, R., May, B., and Westermann, E., Life Sci., 6, 1133 (1967).