1. 1C. A. Harper , Handbook of Components for Electronics; p. 27 . McGraw-Hill, New York, 1977 .
2. 4J. C. Mutin, and J. C. Niepce , "Physical and Chemical Transformation During Sintering of Dielectric Polyphase Ceramics," Rept. under Contract No. DGRST CCM 7970730, 1981 .