1. Burn, J. H., in Adrenergic Mechanisms (edit. by Vane, J. R., Wolstenholme, G. E. W., and O'Connor, M.), 320 (Churchill, London, 1960).
2. Fleckenstein, A., and Burn, J. H., Brit. J. Pharmacol., 8, 69 (1953).
3. Vane, J. R., in Adrenergic Mechanisms, 356 (1960).
4. Stein, L., Fed. Proc., 23, 836 (1964).
5. Doepfner, W., and Cerletti, A., Intern. Arch. Allergy, 12, 89 (1958).