1. L. E. Toth, ?Transition metal carbides and nitrides? (Academic Press, New York, 1971).
2. G. Montel, A. Lebugle andH. Pastor,Rev. Int. Hautes Temp. Refract. 16 (1979) 95.
3. K. Yada,J. Electron Microsc. 31 (1982) 349.
4. H. Pastor,Ind. Ceram. 709 (1977) 573.
5. T. Ogawa andK. Ikawa,J. Nucl. Mater. 105 (1982) 331.