1. Cook, A. W. andWeinstein, S. P. (1973) Chronic dorsal column stimulation in multiple sclerosis.NY. State J. Med.,73, 2868–2872.
2. Geddes, L. A. andBaker, L. E. (1967) The specific resistance of biological material — A compendium of data for the biomedical engineer and physiologist.Med. & Biol. Engng.,5, 271–293.
3. Henshelli, R. D. (Ed.) (1976)Pafec 75: theory, results. Pafec Ltd., 40 Broadgate, Beeston, Nottingham.
4. Henshell, R. D. (Ed.) (1978) Pafec 75:data preparation.——Ibid..
5. Hoppenstein, R. (1975). Electrical stimulation of the ventral and dorsal columns of the spinal cord for the relief of chronic intractable pain: Preliminary report.Surg. Neurol.,4, 187–194.