1. E. Schreiber, O. Anderson, N. Soga, Elastic Constants and Their Measurement (McGraw-Hill, New York, 1973), Chap. 5.
2. J. Maynard, M. McKenna, A. Migliori, W. Visscher, in Ultrasonics of High-Tc and Other Unconventional Superconductors (Academic, Boston, 1992), p. 381.
3. O. Anderson, J. Acoust. Soc. Am. 91, 2245 (1992).
4. H. Ledbetter, C. Fortunko, P. Heyliger, J. Appl. Phys, forthcoming.
5. J. Reddy, An Introduction to the Finite-Element Method (McGraw-Hill, New York, 1993).