1. H.J. Grabke:Metall. Trans., 1970, vol. 1, pp. 2972–75.
2. Hans-Heinrich Angermann and Gerhard Horz:Z. Metallkd., 1991, vol. 82, p. 846.
3. H.J. Grabke:Ber. Bunsen-Ges. Phys. Chem., 1965, vol. 69, p. 409.
4. R.J. Fruehan:Metall. Trans., 1972, vol. 3, pp. 1447–53.
5. R.J. Fruehan and L.J. Martonik:High Temp. Sci., 1971, vol. 3 (3), p. 244.