1. J. E. Lennard-Jones, Devonshire, Proc. Roy. Soc. A,170, 464, 1939; M. Born, J. Chem. Phys.,7, 591, 1939; R. Furth, Proc. Roy. Soc. A,183, 87, 1939; Phil. Mag.,40, VII, 1227, 1949; Y. Thomas, Acta Phys. Hung.,71, 207, 1992.
2. Y. Thomas, Phys. Lett.,66A, 2, 131, 1978.
3. J. K. Roberts and A. R. Miller, Heat and Thermodynamics, N. Y., 5th ed., 1960.
4. Y. Thomas et G. Goureaux, C. R. Acad. Sc., Paris,268, 1518, 1969.
5. N. F. Mott and H. Jones, The Theory of the Properties of Metals and Alloys, Dover Inc., N. Y., 1958.