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2. 2) T. Kawabata, T. Kanai and O. Izumi: Collected Abstracts of the 1979 Autumn Meeting of Japan Inst. Metals, p. 133, (in Japanese).
3. 3) T. Kawabata, Y. Okuyama and O. Izumi: Collected Abstracts of the 1980 Autumn Meeting of Japan Inst. Metals, p. 205, (in Japanese).
4. 4) Y. Takezono, T. Kawabata and O. Izumi: Collected Abstracts of the 1982 Autumn Meeting of Japan Inst. Metals, p. 157, (in Japanese).
5. 5) M. Nobuki, K. Hashimoto and A. Oguchi: Collected Abstracts of the 1982 Autumn Meeting of Japan Inst. Metals, p. 158, (in Japanese).