1. Laser cutting replaces blanking;Schaffer,1981
2. The laser as an industrial cutting tool;Hoffman;Metal Const.,1979
3. An investigation into parameters effecting the cutting efficiency of a cw CO laser;Cooper,1973
4. Laser welding, cutting and drilling Part I;Bolin,1981
5. R. S. Components, R. S. Components library, Data sheet no. 2135, Dec., 1981.