1. Dowson, D. (1979) “History of Tribology”, Longman Publishing, London.
2. Jost, H. P. (1966) “Lubrication (Tribolgy) Education and Research”, Department of Education and Science, Her Majesty’s Stationary Office, London, UK.
3. ASTM (1991) “Terminology Relating to Wear and Erosion, G 40”, American Society for Testing and Materials, Philadelphia, PA.
4. ASTM (1974) “Erosion, Wear, and Interfaces with Corrosion”, STP 567, American Society for Testing and Materials, Philadelphia, PA.
5. Suh, N.P. (1986) “Tribophysics”, Prentice Hall, New Jersey.