1. An analysis of the laser-plasma interaction in laser keyhole welding;Dowden;Appl Phys D,1989
2. Laser Material Processing;Steen,1991
3. In-process monitoring of laser welding for can manufacture;Steen,1991
4. Some novel in-process sensors for laser material processing;Steen,1991
5. Lasers in Industry;Charschan,1972