1. Banghart, H. (1958). J. clin. exp. Psychopath., 19 (Suppl. 1), p. 114.
2. Clinical Psychiatry;Bleuler, M.,1954
3. Cecchi, E., and Ferraris, F. (1959). Minerva med., 50, 4455.
4. Gillhespy, R. 0. (1961). Med. Observ. chemother. Rev., 2, 250.
5. Holdsworth, C. D., Atkinson, M., and Goldie, W. (1961). Lancet, 2, 621.