1. D. W. Rudd, D. W. Rose, and S. Johnson:J. Phys. Chem., 1962, vol. 66, p. 351.
2. E. A. Gulbransen and K. F. Andrew:Trans. TMS-AIME, 1960, vol. 188, p. 586.
3. W. M. Albrecht, W. D. Goode, and M. W. Mallett:J. Electrochem. Soc., 1959, vol. 106, p. 981.
4. T. G. Oakwood and R. D. Daniels: University of Oklahoma, USA, Rept. No. ORC-2570, 1967, p. 10.
5. R. J. Walter and W. T. Chandler:Trans. TMS-AIME, 1965, vol. 233, p. 762.