1. System degenerations of the cerebellum, brain stem and spinal;Greenfield, J.G.
2. The central nervous system in motor neurone disease;Brownell, B.; Oppenheimer, D.R.; Hughes, J.T.;J Neurol Neurosurg Psychiatry,1970
3. Lectures on the Diseases of the Nervous System. Second Series. Transl. Sigerson G;Charcot, J.M.
4. Stimulation of the cerebral cortex in the intact human subject;Merton, P.A.; Morton, H.B.;Nature,1980
5. Scope of a technique for electrical stimulation of human brain, spinal cord and muscle;Merton, P.A.; Morton, H.B.; Hill, D.K.; Marsden, C.D.;Lancet,1982