1. Sherrington CS: The Integrative Action of the Nervous System. Charles Scribner’s Sons, New York, 1906.
2. Head H, Rivers WHR, Sherren J: The afferent nervous system from a new aspect. Brain 28:99–15, 1905.
3. Ranson SW: Unmyelinated nerve fibers as conductors of protopathic sensation. Brain 38:381–389, 1915.
4. Lewis T, Pickering GW, Rothschild P: Centripetal paralysis arising out of arrested blood flow to the limb, including notes on a form of tingling Heart 16:1–32, 1931.
5. Zotterman Y: Studies in the peripheral nervous mechanism of pain. Acta Med Scand 80:185–242, 1933.