1. V. I. Mikheeva and G. G. Babayan, Acad. Sci. USSR Proc. 108 (1956) 327.
2. W. Koster, Z. Metallk. 42 (1951) 326.
3. K. Lieser and H. Witte, ibid 43 (1952) 396.
4. M. Hansen, ?Constitution of Binary Alloys?, 2nd edition (McGraw Hill, New York, 1958).
5. G. Masing, ?Ternary Systems? (Dover, New York, 1960).