1. Impact wear testing machine;Bayer;Wear,1972
2. R. G. Bayer, Fundamentals of wear, to appear in Machine Design.
3. P. A. Engel and F. J. Perry, The impact of a side constrained projectile fired against a tangentially moving target, to be published.
4. Theory of Elasticity;Timoshenko,1970
5. Ball and Roller Bearing Engineering;Palmgren,1959