1. Bar-Cohen, Y., Mal, A.K., and ASM Committee, Ultrasonic Inspection, Nondestr. Eval. Quality Control, Columbus: ASM Int., pp. 231–294, 1989.
2. Blitz, J. and Simpson, G., Ultrasonic Methods of Nondestructive Testing, London: Chapman & Hall, 1996.
3. Ultrasonic Testing;C.J. Hellier,2003
4. Halmshaw, R., Nondestructive Testing, Northampton: Br. Inst. Nondestr. Test., 1991.
5. Bray, D.E. and McBride, D., Nondestructive Testing Techniques, New York: John Wiley & Sons, 1992.