1. H. J. Kopineck, International Conference on: Monitoring Surveillance and Predictive Maintenance of Plants and Structures Taormina, Italy, Proceedings 1: 55–66 (15th - 18th October 1989).
2. M. Spies, E. Schneider, Nondestructive Characterization of Materials (Eds. P. Höller, V. Hauk, G. Dobmann, C.O. Ruud, R.E. Green Jr.) Berlin, Springer Verlag: 296–302 (1989).
3. O. Cassier, B. Courouble and C. Donadille: “ON-LINE characterization of texture of thin steel sheets using ultrasound”, Proceedings of the 5th International Symposium on Nondestructive Characterization of Materials; May 27–30, (1991), Karuizawa, Japan. Eds: Teruo Kishi, Tetsuya Saito, Clayton Ruud, Robert Green Jr.; pp. 477–483.
4. K. Fujisana, R. Murayama, H Fukuoka, M. Hirao: “Development of EMAT monitoring system of formability in cold-rolled sheets”, Proceedings of the 5th International Symposium on Nondestructive Characterization of Materials; May 27–30, (1991), Karuizawa, Japan. Eds: Teruo Kishi, Tetsuya Saito, Clayton Ruud, Robert Green Jr.; pp. 623–634.
5. A. V. Clark, R. B. Thompson, et al.: Res. Nondest. Eval., Vol 2, pp. 239–257 (1990).