1. US Patent;J.E. Gwinnett,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. (1956)
3. D. Stewart: A platform with 6 degrees of freedom, Proc. Inst. Mech. Eng. Part 1 15 (1965) pp. 371–386
4. I.A. Bonev: The true origins of parallel robots, http://www.parallemic.org/Reviews/Review007.html (2003)
5. S. Briot, I.A. Bonev: Are parallel robots more accurate than serial robots?, CSME Transactions 31(4), 445–456 (2007)