1. Harris, T. A., 2001, Rolling Bearing Analysis 4th ed., John Wiley, New York.
2. SKF, 2015, viewed 7 January 2024, Four-point Contact Ball Bearings-Two in One, .
3. Hamrock, B. J., Anderson, W. J., 1972, Arched-outer-race Ball-bearing Analysis Considering Centrifugal Force, NASA Technical Note D-6765.
4. Dynamic modeling and abnormal contact analysis of rolling ball bearings with double half-inner rings
5. Load distribution in a four contact-point slewing bearing