1. The structure of scientific revolutions;Kuhn,1962
2. Evolution of spinal cord surgery for pain;Gildenberg;Clin Neurosurg,2006
3. The history of electrical stimulation and the relief of pain;Rossi,2003
4. History of neuromodulation;Barolat;Neuromod News,1999
5. The William Osler medal essay, the part played by electric fish in the early history of bioelectricity and electrotherapy;Kellaway;Bull Hist Med,1946