1. Bom K. Park: U.S. Patent 4,589,932.
2. I.J. Polmear:Light Alloys, Metallurgy of Light Metals, Edward Arnold Publishing, Baltimore, MD, 1981.
3. M. Cooper and K. Robinson:Acta Cryst., 1966, vol. 20, p. 614.
4. N. Raghunathan and T. Sheppard:Mater. Sci. Technol, 1988, May, pp. 268–80.
5. F.J. Humphreys:Met. Sci., 1979, Mar–Apr., pp. 136–45.