1. Frank, K. (1959)Identification and analysis of single unit activity in the central nervous system. Chapter X in Handbook of Physiology, Section 1: Neurophysiology, Vol. 1, pp. 261–277. American Physiological Society, Washington, D.C.
2. Gesteland, R. C., Howland, B., Lettvin, J. Y. andPitts, W. H. (1959) Comments on microelectrodes.Proc. Inst. Radio Engngs.,47, 1856–1862.
3. Guld, C. (1962) Cathode follower and negative capacitance as high input impedance circuits.Proc. Inst. Radio Engngrs.,50, 1912–1927.
4. Hubel, D. H. (1957) Tungsten microelectrode for recording from single units.Science,125, 549–550.
5. Rose, J. E. andMountcastle, V. B. (1954) Activity of single neurons in the tactile thalamic region of the cat in response to a transient peripheral stimulus.Johns Hopk. Hosp. Bull.,94, 238–282.