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2. R. L. Beurle, “Storage and Manipulation of Information in the Brain,” J. Inst. Electrical Engs. (New Series), Vol. 5 (Feb. 1959).
3. R. L. Beurle, “Functional Organization in Random Networks,” paper presented at the Symposium on Self-Organization at the University of Illinois, June 1960.
4. D. A. Broadbent, “Perception and Communication,” Pergamon Press, Inc., New York.