1. “Engineered Product”, Catalog, Exlar, (2017), p. 178.
2. “Standard Product”, Catalog, Exlar, (2019), p. 77.
3. Bruno, S. C. (1954). U.S. Patent No. 2,683,379. Washington, DC: U.S. Patent and Trademark Office.
4. Pavlov, B. I. (1986) Ball Screw Mechanisms in Instrument-Making Industry. Leningrad: Mashinostroenie. (in Russian).
5. “Ballscrews. Technical information”, Catalog, Hiwin, (Taiwan, 2015), s. 210.