1. J. L. Walker:Physical Chemistry of Process Metallurgy, II, p. 845, Interscience, New York, 1961.
2. G. A. Colligan and B. J. Bayles:Acta Met., 1962, vol. 10, p. 895.
3. T. Z. Kattamis and M. C. Flemings:Mod. Castings, 1967, vol. 52, p. 97.
4. T. Z. Kattamis and M. C. Flemings:Trans. TMS-AIME, 1966, vol. 236, p. 1523.
5. L. Northeott:J. Inst. Metals, 1939, vol. 65, p. 173.