1. B. A. Wilcox and A. H. Clauer:The Superalloys, T. C. Sims and W.C. Hagel, eds., Wiley, New York, NY, 1972, p. 197.
2. J. S. Benjamin:Metall. Trans., 1970, vol. 1, p. 2943.
3. G. H. Gessinger:Metall. Trans. A, 1976, vol. 6A, p. 1203.
4. K. H. Kramer:Powder Metallurgy Int., 1977, vol. 9, p. 105.
5. T. K. Glasgow:Metallurgy and Manufacture: Proc. of the 3rd Int. Symposium on Superalloys, Claitor's Publishing Division, Baton Rouge, LA, 1976, p. 385.