References
W. Elber, The Significance of Fatigue Crack Closure, ASTM STP 486, ASTM (1970) 230–242.
R. A. Schmidt, Extremely Slow Fatigue Crack Propagation, Ph. D. Thesis, Lehigh University, 1972.
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Roberts, R., Schmidt, R.A. Observations of crack closure. Int J Fract 8, 469–471 (1972). https://doi.org/10.1007/BF00191113
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DOI: https://doi.org/10.1007/BF00191113