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2. M. Becker, N. Gro, and R. Herzer, “Determination of preload in bolts by ultrasound without referencing in unloaded state,” ibid., p. 59.
3. Z. Zhang, M. Liu, Z. Su, and Y. Xiao, “Evaluation of bolt loosening using a hybrid approach based on contact acoustic nonlinearity,” ibid., pp. 37–38.
4. P. S. Prevéy, “Current applications of x-ray diffraction residual stress measurement,” in: Developments in Materials Characterization Technologies, G. F. Vander Voort and J. J. Friel (eds.), Amer. Soc. Metals, Materials Park, OH, pp. 103–110.
5. T. Gnäpel-Herold et al., “A comparison of neutron and ultrasonic determinations of residual stress,” Meas. Sci. Technol., 11, 430–444 (2000).