1. L. I. Mandel’shtam, Lectures on Vibration Theory (Nauka, Moscow, 1972) [in Russian].
2. L. Brillouin and M. Parodi, Wave Propagation in Periodic Structures (Dover, New York, 1953; Inostrannaya Literatura, Moscow, 1959).
3. M. Born and K. Huang, Dynamical Theory of Crystal Lattices (Clarendon, Oxford, 1954; Inostrannaya Literatura, Moscow, 1972).
4. A. A. Maradudin, E. W. Montroll, and G. H. Weiss, Theory of Lattice Dynamics in the Harmonic Approximation, Suppl. 3: Solid State Physics (Academic, New York, 1963; Nauka, Moscow, 1965).
5. V. L. Biderman, Applied Theory of Mechanical Oscillations (Vysshaya Shkola, Moscow, 1972) [in Russian].