1. Achterberg, J. (1983). Pre-biofeedback and relaxation.Body-Mind Tapes. San Francisco: New Era Media.
2. Achterberg, J. (1985).Imagery in healing: Shamanism and modern medicine. Boston and London: Shambhala (New Science Library).
3. Black, E. R. (1977). Current estimates from the health interview survey of the United States?1976.Vital Health Statistics, 1?80 (Series 10,No. 119).
4. Bonica, J. J. (1978). Pathophysiology of pain.Hospital Practice, 13 4?14.
5. Buckwalter, K. C., & Buckwalter, J. A. (1977). Pain associated with orthopedic conditions. In A. K. Jacox (Ed.),Pain: A source book for nurses and other health professionals. Boston: Little, Brown.