1. Directive 85/374/EEC, amended by Directive 99/34/EC, “EU directive on the responsibility for defective products,” 1999.
2. R. Krenn, M. Wasserbauer, P. Widek, G. Fuchs, S. Falter, Testing of forged bars with phased arrays for aerospace applications, in: 18th World Conf. on Nondestructive Testing, Durban, South Africa, April 2012.
3. W. A. K. Deutsch, et.al., Automated ultrasonic testing systems for bars and tubes, examples with mono-element and phased array probes, in: 11th European Conference on Non-Destructive Testing (ECNDT 2014), Prague, Czech Republic, October 6-10, 2014.
4. Elliptical-Tukey chirp signal for high-resolution, aircoupled ultrasonic imaging;Pallav;IEEE Trans. Ultr. Ferr. Freq. Contr.,2007
5. Use of modulated excitation signals in medical ultrasound. Part I:basic concepts and expected benefits;Misaridis;IEEE Trans. Ultr. Ferr. Freq. Contr.,2005