1. Phase Relations and Stability Studies in the Si3N4-SiO2-Y2O3 Pseudoternary System
2. 3A. W. J. M. Rae, D. P. Thompson, N. J. Pipkin, K. H. Jack; and P. Popper pp.347 -60 inSpecial Ceramics 6 . British Ceramic Research Association, Stoke-on-Trent, England, 1975 .
3. 4F. F. Lange, S. C. Singhal, and R. C. Kuznicki , "Phase Relations and Stability Studies in the Si3N4-SiO2-Y2O3Pseudo-Ternary System ," Westinghouse Tech. Rept. N00014--74-C-0284, 1976 .
4. 5A. W. J. M. Rae, D. P. Thompson, K. H. Jack; J. J. Burke, E. M. Lenoe, and R. N. Katz pp.1039 -67 inCeramics for High Performance Applications: II , Vol. V . Brook Hill, Chestnut Hill, Mass., 1978 .