1. J. O. Hirschfelder, ed., Advances in Chemical Physics,Vol. 12, Wiley, New York (1967), Chapters 1–4.
2. J. O. Hirschfelder, F. Curtiss, and R. B. Bird, Molecular Theory of Gases and Liquids, Wiley, New York ( 1964k Chapter 2.
3. I. M. Torrens, Interatomic Potentials,Academic Press, New York (1972), Chapters 1, 3, and 4.
4. J. Goodisman, Diatomic Interaction Potential Theory,Vol. 1, Academic Press, New York (1973), Chapters 1 and 2.
5. O. Firsov, Zh. Eksp. Teor. Fiz. 21, 1001 (1951), and texts above.