Yoseph Bar-Cohen and Cynthia L. Breazeal, Biologically inspired intelligent robots. Bellingham, Washington: SPE - The international Society for Optical Engineering, 2003.
ALAIN BERTHOZ,
The brain's sense of movement , Editions Odile Jacob 1997th ed. Copyright © 2000 by the President and Fellows of Harvard College, 2000, p. 328.