References
- Baker , G. A. 1975 . Essentials of Padé Approximants , New York : Academic Press .
- Ball , M. A. 1975 . J. Phys. C , 8 : 3328
- Balkanski , M. , ed. 1977 . Lattice Dynamics , Paris : Flammarion .
- Brockhouse , B. N. and Stewart , A. T. 1958 . Rev. mod. Phys. , 30 : 236
- Brovman , E. G. and Kagan , Yu. M. 1974 . Dynamical Properties of Solids , Edited by: Horton , G. K. and Maradudin , A. A. Vol. 1 , Amsterdam : North-Holland .
- Cochran , W. 1971 . CRC crit. Rev. solid St. Sci. , 2 : 1
- 1973 . The Dynamics of Atoms in Crystals , London : Edward Arnold .
- Cowley , R. A. , Woods , A. D. B. and Dolling , G. 1966 . Phys. Rev. , 150 : 487
- Herman , F. 1959 . J. Phys. Chem. Solids , 8 : 405
- Kittel , C. 1966 . Introduction to Solid State Physics , New York : J. Wiley .
- Lanczos , C. 1966 . Discourse on Fourier Series , Edinburgh : Oliver & Boyd .
- Leigh , R. S. , Szigeti , B. and Tewary , V. K. 1971 . Proc. R. Soc. A , 320 : 505
- Pines , D. 1963 . Elementary Excitations in Solids , New York : W. A. Benjamin .
- Sommerfeld , A. 1949 . Partial Differential Equations in Physics , New York : Academic Press .
- Weber , W. 1974 . Phys. Rev. Lett. , 33 : 371
- Ziman , J. 1964 . Adv. Phys. , 13 : 89