1. 1. See, for example, Lasers & Applications 6 (1) 73 (1987)
2. 2. and Laser Focus 23, 52 (January 1987)
3. J.F. Ready: Effects of High Power Radiation, (Academic, New York 1971)
4. S.S. Charschan: Laser in Industry, (Van Nostrand, New York 1972)
5. W.W. Duley: CO 2 Lasers, Effects and Applications, (Academic, New York 1976)