References
- http://www.parallemic.org
- D. Stewart, ' A plarform with six degree of freedom,' Proc. of the Institute of Mechanical Engineers(Part 1), vol. 180, no. 15, pp.371-386, 1965-1966 https://doi.org/10.1243/PIME_PROC_1965_180_029_02
- J. E. Gwinnett, 'Amusement devices,' US Patent No. 1,789,680,January 20, 1931