1. Akira Oda, Proc. Ariake Techn. College, Omuta, Japan, 1983, pp821–827
2. Kirsten Dorph, Scandinavian Journal of Metallurgy, 6 (1977) pp38–39
3. Ö.A. Atasoy, Z. Metallkunde, Bd. 75 (1984) H.6, pp463–471.
4. Metals Handbook, 9th Edit., Vol.3, pp568–588.
5. B.H. Kear, UTRC, Int. Materials Congr. March 26–29, 1979, Reston, Virginia