1. 1) C. T. Sims and C. W. Hagel: The superalloys, (John Wiley & Sons, New York, 1972) pp. 145–174.
2. 2) B. Lux and W. Bollmann: Cobalt. 42 (1969) 3.
3. 3) C. T. Sims, N. S. Stoloff and W. C. Hagel: Superalloys II, (John Wiley & Sons, New York, 1987) pp. 135–163.
4. 4) T. B. Massalski, H. Okamoto, P. R. Subramanian and L. Kacprzak: Binary Alloy Phase Diagrams Second Edition, 1, (ASM) p. 137.
5. 5) M. Ellner, S. Kek and B. Predel: J. Alloy & Compounds. 189 (1992) 245–248.