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2. Creese, R. C. (1988) Introduction to expert systems to foundry applications. AFS Transactions, 96, 443?446.
3. Devis, J. R. (1989) Metals Handbook, ASM International Handbook Committee, Metals Park, OH, 17, edn 9.
4. Juran, J. M. (1964) Managerial Breakthrough, McGraw-HIll, New York.
5. Ishikawa, K. (1976) Guide to Quality Control, Asian Productivity Organisation, Nordica International Limited, Hong Kong.