1. Sansalone, M.K., Lin, J.M., Streett, W.B.: Determining the depth of surface-opening cracks using impact-generated stress waves and time-of-flight techniques. ACI Mater. J. 95(2), 168–177 (1998)
2. Hevin, G., Abraham, O., Pedersen, H.A., Campillo, M.: Characterization of surface cracks with rayleigh waves: a numerical model. NDT & E Int. 31(4), 289–297 (1998)
3. Kee, S.-H., Zhu, J.: Using air-coupled sensors to determine the depth of a surface-breaking crack in concrete. J. Acoust. Soc. Am. 127(3), 1279–1287 (2010)
4. Popovics, J.S., Song, W.-J., Ghandehari, M., Subramaniam, K.V., Achenbach, J.D.: Application of surface wave transmission measurements for crack depth determination in concrete. ACI Mater. J. 97(2), 127–135 (2000)
5. Song, W.-J., Popovics, J.S., Aldrin, J.C., Shah, S.P.: Measurement of surface wave transmission coefficient across surface-breaking cracks and notches in concrete. J. Acoust. Soc. Am. 113(2), 717–725 (2003)