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http://www.sematech.org/public/roadmap/ntrs94.pdf
.
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3. Gerstenberg, D. in Handbook of Thin Film Technology (eds Maissel, L. & Glang, R.) Ch. 19, page 8 (McGraw-Hill, New York, (1970)).
4. Waser, R., Baiatu, T. & Härdtl, K.-H. DC electrical degradation of perovskite-type titanates: I, ceramics. J. Am. Ceram. Soc. 73, 1645–1653 (1990).
5. Baiatu, T., Waser, R. & Härdtl, K.-H. DC electrical degradation of perovskite-type titanates: I, Ceramics. J. Am. Ceram. Soc. 73, 1663–1673 (1990).