1. Ultrasonics, Nondestructive Testing Handbook, Vol. 7 (American Society for Nondestructive Testing, Columbus, OH 1991)
2. Metals Handbook, Vol. 17 (ASM International, Metals Park, Ohio 1989)
3. R. B. Thompson, Quantitative ultrasonic nondestructive evaluation methods, J. Appl. Mech 50, 1191–1201 (1983)
4. R. B. Thompson, D. O. Thompson, Ultrasonics in nondestructive evaluation, Proc. IEEE, 73, 1716–1755 (1985)
5. W. Voigt, Lehrbuch der Kristallphysik (Tauber, Leipzig 1928)