1. M. Suzuki, M. Kagawa, Y. Syono and T. Hirai, in ?Ceramic transactions 22?, Ceramic Powder Science IV, edited by S. Hirano, G. L. Messing and H. Hausner (The American Ceramic Society, Westerville, Ohio, 1991) p. 147.
2. Idem. J. Cryst. Growth 112 (1991) 621.
3. O. Matsumoto, H. Toshima and Y. Kanzaki, Thin Solid Films 128 (1985) 341.
4. M. S. J. Gani and R. Mcpherson, J. Mater. Sci. 15 (1980) 1915.
5. M. Kagawa, M. Suzuki, T. Hirai and Y. Syono, in Proceedings of the International Symposium on Plasma Chemistry, Tokyo, edited by K. Akashi and A. Kinbara, (1987) p. 1084.