1. Brodie, B. B., and Costa, E., Psychopharmacol. Serv. Center Bull., 2, No. 5, 1 (1962); (reprinted from Monoamines et Système Nerveux Central, Georg, Geneva, 1962).
2. Osmond, H., and Smythies, J., J. Ment. Sci., 98, 309 (1952).
3. Woolley, D. W., and Shaw, E., Proc. US Nat. Acad. Sci., 40, 228 (1954).
4. Dewhurst, W. G., in Studies in Psychiatry (edit. by Davies, D. L., and Shepherd, M.), (Oxford University Press, London, 1968).
5. Dewhurst, W. G., thesis, Univ. London (1961).