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2. M. Marmach, D. Servent, R. H. J. Hannink, M. J. Murray andM. V. Swain, ?Toughened PSZ Ceramics ?Their Role as Advanced Engine Components?,ibid., paper 830318.
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5. R. H. J. Hannink, M. Marmach, M. J. Murray andM. V. Swain, in ?Proceedings of the Eleventh Australian Ceramic Conference?, Sydney, Australia (Australian Ceramic Society, 1984) p. 57.