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2. Percutaneous stimulation of spinal cord and brain: Pyramidal tract conduction velocities in man;Marsden, C.D.; Merton, P.A.; Morton, H.B.;J Physiol (London),1982
3. Electrical stimulation over the human vertebral column: which neural elements are excited?;Mills, K.R.; Murray, N.M.F.;EEG Clin Neurophysiol,1986
4. Methodik;Ludolph, A.C.; Spille, M.; Masur, H.;Z EEG-EMG; Ableitung von evozierten Muskelpotentialen nach Stimulation uber den motorischen Wurzein,1988
5. Percutaneous electrical stimulation of the cervical motor roots: Methodology and normal values;Schmid, U.D.; ChW, Hess; Ludin, H.P.;Z EEG-EMG,1989