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2. The pathogenesis of Parkinson's disease: a new hypothesis;Barbeau, A.;Canad. med. Ass. J,1962
3. Electrical correlates of the spinal flexor reflex;Brooks, C.McC; Fuortes, M.G.F.;Brain,1952
4. Antagonistic muscles in the production of clonus in man;Cook, Jr, W.A.;Neurology (Minneap.),1967
5. A simple clinical skin electrode;Copland, J.G.; Davies, C.T.M.;Lancet,1964