1. The plasma advantage in automated welding;Raymond;Weld J,1988
2. Investigation of the effect of welding parameters on weld quality of plasma arc keyhole welding of structural steels;Martikainen;Weld J,1993
3. Study of keyhole closure and analysis of microstructure and mechanical performance of weld joints for variable polarity vertical up plasma arc welding process;Wang;Sci Technol Weld Join,2006
4. Establishment of stable keyhole pool during variable polarity vertical-up plasma arc welding process;Wang;Chin J Mech Eng,2006
5. The plasma arc welding: a review;Craig;Weld J,1988