1. M. N. Uddin, Ind. Laser Rev. 6 (2) (1991) p. 11.
2. C. A. Forbis-Parrott, Weld. J. 70 (7) (1991) 37.
3. C. Magnusson, Svetsaren 46 (2) (1992) 12.
4. S. T. Riches, Weld. Metal Fabric. 61 (2) (1993) 79.
5. H. Maruo, in “Proceedings of the Conference on Laser Advanced Materials Processing (LAMP'92)”, Niigata, June 1992, edited by S. Namba and A. Matsunawa (High Temperature Society of Japan, Osaka, 1992) p. 29.