1. Krautkrämer, J. and Krautkrämer, H., Ultrasonic Testing of Materials, 4th Ed., Springer-Verlag Berlin Heidelberg New York, 1990, ISBN:3-540-51231-4.
2. Szilard, J., (Ed.) Ultrasonic Testing, Non-Conventional Testing Techniques, John Wiley & Sons, Ltd., 1982, ISBN:0-471-27938-2.
3. Fundamentals of Nondestructive Testing, American Society for Metals (ASM) and The American Society for Nondestructive Testing, Lesson 5, Ultrasonic Testing—Fundamentals, 1972.
4. http://www.ndt-ed.org/EducationResources/CommunityCollege/Ultrasonics/cc ut index.htm.
5. http://www.ndt-ed.org/index flash.htm.