1. 1) J. Cmpbell: CASTINGS, (Butterworth-Heinemann Ltd., 1991) p. 98.
2. 2) T. Makiguchi: IMONO 62 (1990) 566–573.
3. 3) H. Oota, Y. Sakaguchi, K. Kuniyoshi and H. Murata: Report of JFS Meeting 152, (1979) p. 48.
4. 4) R. E. Morey: Trans. AFS 54 (1949) 129.
5. 5) S. Katashima, S. Tashima and Y. Mikawa: Report of AFS Meeting 113, (1988) p. 91.