1. P. Brezina, E. E.Dös,Th. Geiger, L. Habel, M. Lorenz, and W. Wintsch, Prakt. Metallographie 10/6,342 and 10 /7, 377 (1973).
2. D. Coutsouradis, H. Fischmeister, P. Felix, L. Habraken, Y. Lindblom, and M. O. Speidel, High Temperature Alloys for Gas Turbines. London: Applied Science Publishers 1978.
3. W. Hoffeiner, E. Kny, R. Stickler, and W. J. McCall, Z. Werkstofftechnik 10, 84 (1979).
4. V. Thien, F. Schmitz, W. Slotty, and W. Voss, Fresenius’ Z. Anal. Chem. 319, 646 (1984).
5. K. H. Kloos, K. Stein, and B. Kaiser, Metall 38/8 and 38 /12, 1161 (1984).