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2. 2) H. Okamura: Character of Friction Stir Welding and Application in Japan, Journal of the Japan Welding Society, 67-7, (2000), 11-17. (in Japanese)
3. 3) N. Enomoto: Application of FSW by Material Suppliers, Journal of the Japan Welding Society, 67-7, (2000), 18-22. (in Japanese)
4. 4) Stephan W. Kellie, John Davenport, and Dave Nicholas: Railway Manufactures Implement Friction Stir Welding, Welding Journal, Vol.81, No.10 (2002), 47-50.
5. 5) T. Tatsuya: Application of Friction Stir Welding to Copper Backing Plate, Journal of the Japan Welding Society, 72-6, (2003), 56-59. (in Japanese)