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4. R. Bianchetti, M. A. Hamstad, and A. K. Mukherjee, Origin of burst-type acoustic emission in unflawed 7075-T6 aluminum,J. Testing Eval. 4(5):313?318 (1976).
5. Metals Handbook, 8th ed., Vol. 1 (American Society for Metals, Metals Park, Ohio, 1961).