References
Fischer, R.: Science [Lancaster, Pa.]118, 409 (1953).
Altschule, M. D.: Bodily Physiology in Mental and Emotional Disorders, p. 109. New York: Grune & Stratton 1953.
Hawk, Ph. B. et al.: Practical Physiological Chemistry, p. 62. Philadelphia: Blakiston & Co. 1944.