1. G. Leibfried, Microscopic Theory of Mechanical and Thermal Properties of Crystals, in Handbuch der Physik, Ed. by S. Flügge (Springer-Verlag, Berlin, 1963; GIFML, Moscow, 1963), Vol. 7, Ch. 1.
2. G. Leibfried and V. Ludwig, Theory of Anharmonic Effects in Crystals, Solid State Phys. 12, 275 (1961).
3. L. Girifalco, Statistical Physics of Materials (Wiley, New York, 1973).
4. A. M. Kosevich, Principles of the Mechanics of the Crystal Lattice (Nauka, Moscow, 1972) [in Russian].
5. Ch. Kittel, Introduction to Solid State Physics (Wiley, Chapman Hall, New York, London, 1953).