1. G. M. McClelland, in Adhesion and Friction, M. Grunze and H. J. Kreuzer, eds. Springer Series in Surface Science 17 (Springer Verlag, Berlin, 1990), p. 1.
2. G. A. Tomlinson, Phil. Mag. Series 7
7, 905 (1929).
3. J. Skinner, “An Atomic Model of Friction,” unpublished manuscript, Central Electricity Generating Board Report number RD/B/N3137, Berkeley Nuclear Laboratories (1974).
4. see, for example H. Goldstein, Classical Mechanics, 2nd ed. (Addison-Wesley, Reading, 1980).
5. M. Hirano and K. Shinjo, Phys. Rev. B 41, 11837 (1990).