1. II. Note on static friction and on the lubricating properties of certain chemical substances
2. Standard Handbook of Lubrication Engineering;Godfrey,1968
3. The Friction and Lubrication of Solids;Bowden,1964
4. Physical Chemistry of Surfaces;Adamson,1967
5. W.A. Zisman, in Contact Angle, Wettability and Adhesion, vol. 43 of Advances in Chemistry Series, American Chemical Society, 1964, p. 9.