1. Dynamics of Perfect Crystals;Venkataraman,1975
2. Theory of Lattice Dynamics in the Harmonic Approximations;Maradudin,1971
3. The Lattice Dynamics and Statics of Alkali Halide Crystals;Hardy,1979
4. Phonon Dispersion Relations in Insulators;Bilz,1979
5. Theory of Brillouin Zones and Symmetry Properties of Wave Functions in Crystals