1. Abramson, D. I., and Ferris, E. B. (1940). Amer. Heart J., 19, 541.
2. Abramson, D. I., and Ferris, E. B. and Katzenstein, K. H. (1941). Ibid., 21, 191.
3. Ackner, B. (1956a). J. Psychosom. Res., 1, 3.
4. Ackner, B. (1956b). Ibid., 1, 21.
5. Ackner, B. and Pampiglione, G. (1955). Electroenceph. clin. Neurophysiol., 7, 153.