1. Brink, F. (1954). Pharmacol. Rev., 6, 243.
2. Brown, G. L. (1938). J. Physiol. (Lond.), 92, 23P. Churchill-Davidson, H. C., and Richardson, A. T. (1952). Proc. roy. Soc. Med., 45, 179.
3. Denny-Brown, D., and Nevin, S. (1941). Brain, 64, 1.
4. Eaton, L. M., and Lambert, E. H. (1957). J. Amer. med. Ass., 163, 1117.
5. The Physiology of Nerve Cells;Eccles, J.C.,1957