1. Institution of Mechanical Engineers “Memorandum on Definitions, Symbols and Units”, Conference on Lubrication and Wear, Proc I. Mech. E., London, Vol. 4. (1957)
2. Organisation for Economic Co-operation and Development, “Glossary of Terms and Definitions in the Field of Friction, Wear and Lubrication”, Research Group on Wear of Engineering Materials of the European OECD, Paris, p. 53(1969)
3. “A Review of Scuffing and Running in of Lubricated Surfaces with Asperities and Oxides in Perspective.”;Ludema;Wear,1984
4. Blok, H., “Theoretical Study of Temperature Rise at Surfaces of Actual Contact under Oiliness Lubricating Conditions”, I. Mech. E., Proc. Gen. Disc. Lubrication Pt 2, pp. 222–235, (1937)
5. “The Critical Temperature of Oil with Point and Line Contact Machines”;Matveevsky;Trans. ASME, J. Basic Eng.,1965