1. Prine, D.W.: Synthetic aperture ultrasonic imaging. In: Proc. of the Eng. Appl. of Holography Symposium, p. 287. SPIE Press, Bellingham (1972)
2. Silk, M.G.: Sizing crack-like defects by ultrasonic means. In: Sharpe, R.S. (ed.) Research Techniques in Non-Destructive Testing, vol. 3. Academic Press, London (1977)
3. Spies, M., Rieder, H.: Synthetic aperture focusing of ultrasonic inspection data to enhance the probability of detection of defects in strongly attenuating materials. NDT E Int. 43, 425–431 (2010)
4. Frederick, J.R., Seydel, J.A., Fairchild, R.C.: Improved ultrasonic nondestructive testing of pressure vessels. U.S. Nuclear Regulatory Commission Report NUREG-0007-1 (1976)
5. Seydel, J.A.: Ultrasonic synthetic aperture focusing techniques in NDT. In: Sharpe, R.S. (ed.) Research Techniques in Nondestructive Testing, vol. 6, pp. 1–47. Academic Press, London (1982)