1. E. Fitzer andR. Ebi, in ?Silicon Carbide?, Proceedings of the Third International Conference, Miami Beach, FL, 17?20 Sept 1973, edited by R. C. Marshall, J. W. Faust and C. E. Ryan (University of South Carolina Press, 1974) p. 320.
2. G. Ervin,J. Amer. Ceram. Soc. 41 (1958) 347.
3. E. A. Gulbransen andS. A. Jansson Oxid Metal 4 (1972) 181.
4. C. Wagner,J. Appl. Phys. 29 (1958) 1295.
5. D. E. Rosner andH. D. Allendorf,J. Phys. Chem. 74 (1970) 9.