1. W.M. Steen, Laser Material Processing, Springer, London, 1991.
2. C. Dawes, Laser Welding, Abington Publishing, New York, NY, 1992.
3. J.Y. Jeng, T.F. Mau, S.M. Leu, Gap Inspection and Alignment using Vision Technique for Laser Butt Joint Welding, submitted for publication.
4. S. Haykin, Neural Networks — A Comprehensive Foundation, Macmillan, New York, NY, 1994.
5. J.A. Freeman, D.M. Shapura, Neural Networks — Algorithms, Applications, and Programming Techniques, Addison-Wesley, New York, NY, 1991.