1. F.L. Riley (Ed.), Nitrogen Ceramics, NATO Advanced Study Institutes Applied Science, series No. 23, Noordholf International, Leyden, 1974.
2. R.A. Andrievskii, I.I. Spivak, Silicon nitride and materials on its base, Metallurgiya, Moscow, 1984.
3. Silicon Nitride and Related Materials
4. J.G. Lee, R. Casarini, B. Cutler, Ind. Heating April (1976) 50.