1. Beecher, H. K. The powerful placebo. Journal of the American Medical Association, 1955, 151, 1602–1606.
2. Bresler, D. E. Free yourself from pain. New York: Simon & Schuster, 1979.
3. Bresler, D., and Trubo, R. Conditioned relaxation: the pause that refreshes. In J. Gordon, D. Jaffee, and D. Bressler (Eds.), Mind, body, health: towards an integral medicine (Monograph). Bethesda, Maryland: National Institute for Mental Health, 1980.
4. Cousins, N. The mysterious placebo. Saturday Review, October 1, 1977, 9–16.
5. Frank, J. The faith that heals. Johns Hopkins University Medical Journal, 1975, 137, 127–131.