1. Stolarsky, T.A.: Tribology in Machine Design. Butterworth-Heinemann, Stoneham-London (1990)
2. Lecture Notes in Applied and Computational Mechanics;P. Flores,2008
3. Johnson, K.L.: One hundred years of Hertz contact. Proc. Inst. Mech. Eng. 196, 363–378 (1982)
4. Goldsmith, W.: Impact, The Theory and Physical Behaviour of Colliding Solids. Edward Arnold, Sevenoaks (1960)
5. Brach, R.M.: Mechanical Impact Dynamics, Rigid Body Collisions. Wiley, New York (1991)