1. Materials and Process in Manufacturing;Degarmo,1997
2. Beitrag zur Kenntnis des Verschleissvorgangens beim Kurzversuch;Tonn;Z. Metallk.,1937
3. Electric contacts;Holm,1946
4. The Friction and Lubrication of Solids;Bowden,2008
5. Contact and rubbing of flat surfaces;Archard;J. Appl. Phys.,1953