1. R.M. German and Z.A. Munir:High Temp. Sci., 1976, vol. 8, pp. 267–80.
2. R.M. German and V. Ham:Int. J. Powder Metall. Powder Technol., 1976, vol. 12, pp. 115–25.
3. R.M. German and Z.A. Munir:Metall. Trans. A, 1976, vol. 7A, pp 1873–77.
4. C.J. Li and R.M. German:Metall. Trans. A, 1983, vol. 14A, pp. 2031- 41.
5. G.H. Gessinger and H.F. Fischmeister:J. Less-Common Met., 1972, vol. 27, pp. 129–41.