1. J.E. Gwinnett: Amusement device, Patent 1789680 (1931)
2. V.E. Gough: Contribution to discussion of papers on research in automobile stability, control and tyre performance, 1956-1957. Proc. Auto Div. Inst. Mech. Eng
3. D. Stewart: A platform with 6 degrees of freedom, Proc. Inst. Mech. Eng. 180(1,15), 371–386 (1965)
4. I.A. Bonev: The true origins of parallel robots. http://www.parallemic.org/Reviews/Review007.html , (2003)
5. J. Albus, R. Bostelman, N. Dagalakis: The NIST ROBOCRANE, J. Robot. Syst. 10(5), 709–724 (1993)