1. M. A. Arbib, Handbook of Physiology — The Nervous System II. Motor Control, ed. V. B. Brooks (American Physiological Society, Bethesda, MD, 1981) pp. 1449–1480.
2. M. A. Arbib, The Encyclopedia of Artificial Intelligence, ed. S. Shapiro (Wiley-Interscience, New York, 1992) pp. 1427–1443.