1. Maradudin A.A., Montroll E.W., Weiss G.A., Ipatowa I.P. (1971) Lattice Dynamics in Harmonic Approximation. N.Y. Academic Press
2. Cochran W. (1973). The Dynamics of Atoms in Crystals. Arnold
3. Ghatak A.K., Kothari L.S. (1973). Lattice Dynamics. Addison Wesley
4. Willis B.T.M., Pryor A.W. (1975). Vibrations in Crystals. Cambridge
5. Cochran W., Cowley R.A. (1967). Handbuch der Physik 25,2a,59. Springer