1. Condon, E. U. and H. Odishaw, eds. Handbook of Physics. New York: McGraw-Hill, 1958, p. 2–15.
2. Coiffet, Phillipe, and M. Chirouze. An Introduction to Robot Technology, translation by Meg Tombs. New York: McGraw-Hill, 1983, p. 35.
3. Hohn, R. E. Tomorrow’s technology today: Cincinnati Milacron at Robots 10. Proc. Robots 10 Conference. Dearborn, Mich.: Robotics International of SME, April 1986, pp. 10–26.
4. “Robot Sensing and Intelligence,” IEEE short course presented by satellite transmission in November, 1983. Prepared by the Institute of Electrical and Electronic Engineers, Parsippany, NJ.