1. S. Pejovnik, V. Smolej, D. Susnik, and D. Kolar, Powder. Met. Intern., 11: 22 (1979).
2. R. L. Coble and R. M. Cannon, in “Processing of Crystalline Ceramics”, Mat. Sci. Res., Vol. 11, Eds. H. Palmour, R. F. Davis, and T. M. Hare, Plenum Press, NY (1978), pp. 151 – 170.
3. D. L. Johnson, in “Sintering Processes”, Mat. Sci. Res., Vol. 13, Ed. G. C. Kuczynski, Plenum Press, NY (1980), pp. 97 – 106.
4. H. E. Exner and G. Petzow, Ibid, pp. 107–120.
5. E. A. Barringer, PhD Thesis, M.I.T. (1983).