1. Champaigne J. Almen gage calibration. In: ICSP-8, Garmisch-Partenkirchen, Germany, 2002. p. 108–13.
2. Nachman G. Shot peening—past, present and future. In: ICSP-7, Warsaw, Poland, 1999. p. 1–4.
3. Al-Hassani STS. Mechanical aspects of residual stress development in shot peening. In: ICSP-1, Paris, 1981. p. 583–602.
4. La mesure des constaintes residuelles: methode de la (Fleche) methode de las (source de constraintes);Flavenot,1977
5. Contact mechanics;Johnson,1987