1. E. Scheil and K. Kiwit,Arch. Eisenhuttenw. 9, 405 (1936).
2. N. Collari and N. Fongi,Metall. 46, 111 (1954).
3. S. Guruswamiet al., Oxid. Metal. 19, 77 (1983).
4. S. K. Mukherjee and G. S. Upadhyaya,Int. J. P/M P/T 19, 289 (1983).
5. O. Kubaschewski and E. L. Evans,Metall. Thermochem. (Pergamon Press, London, 1958).