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2. The fatigue of metals;Gough,1926
3. A brief history of fractography;Lynch;J Fail Anal Prev,2006
4. Fatigue failures with special reference to fracture characteristics;Cottell,1954
5. Fractography-based estimation of fatigue crack “initiation” and growth lives in aircraft components, NLR-TP-2006-184;Wanhill,2006