1. Welding Processes and Technology;Parmer,1992
2. Submerged Arc Welding;Hould croft,1989
3. Welding Handbook, vol. 2, second ed., American Welding Society, 1978.
4. The Design of Experiments to Find Optimal Conditions;Adler,1975
5. Factorial techniques for weld quality prediction;Harris;Met. Construction J.,1983