1. G. Johnson, Ultrasonic Flaw Detectors…And Beyond A history of the discovery of the tools of nondestructive technology. in Quality Magazine (BNP Media, 2013), Vol. 52, pp. 22–24.
2. D. Canonico, “The History of ASME’s Boiler and Pressure Vessel Code,” Retrieved from www.asme.org on March 5, 2015.
3. V. Deutsch, “History of NDT-Instrumentation,” in 15th World Conference on Non-Destructive Testing, 2000.
4. On waves in an elastic plate
5. Experimental Confirmation of Lamb Waves at Megacycle Frequencies