1. Fondamentals of Tribology;Godfrey,1980
2. F.F. Ling, Boundary Lubrication an Appraisal of World litterature, ASME (1969).
3. D. Tabor, Friction Wear Lubrication in Surface and Colloid Science 5 in E. Matijevic J. Wiley, (1965).
4. A.S. Admatov, Molecular Physics of Boundary Lubrication, Israel Program for Scientific Translation, Jerusalem (1966).