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4. 4) T. Nakagawa and Y. Oyanagi: UP Applied Mathematics Series 7, University of Tokyo Press, ISBN 4-13-064067-4 (1982), Chapter 8. (in Japanese)
5. 5) Y. Ueda, Y. Kim and M. Yuan : A Prediction Method of Welding Residual Stress using Source of Residual Stress, Quarterly Journal of the Japan Welding Society, 6-1 (1988), 59-64, etc. (in Japanese)