Jang, S. Y., Choi, S. S. (2014), Crack and Damage Patterns of Concrete Track of Kyeong-Bu High-Speed Railways, Proceedings of the 2014 autumn conference and annual meeting of the Korean Society for Railway, KSR2014S278.

Freudenstein, S. (2010), RHEDA 2000®: ballastless track systems for high-speed rail applications, International Journal of Pavement Engineering, 11(4), 293-300.

Gautier, P.-E. (2015), Slab track: Review of existing systems and optimization potential including very high speed, Construction and Building Materials, 92, 9-15.

Ren, J., Yang, R., Wang, P., Yong, P., Wen, C. (2014), Slab upwarping of twin-block slab track on subgrade-bridge transition section, Journal of Transportation Research Board, 2448(1), 115-124.

Zhu, S., Cai, C. (2014), Interface damage and its effect on vibrations of slab track under temperature and vehicle dynamic loads, International Journal of Non-Linear Mechanics, 58, 222-232.

Zhu, S., Wang, M., Zhai, W., Cai, C., Zhao, C., Zeng, D., Zhang, J. (2018), Mechanical property and damage evolution of concrete interface of ballastless track in high-speed railway: Experiment and simulation, Construction and Building Materials, 187(30), 460-473.

Zhong, Y., Gao, L., Zhang, Y. (2018), Effect of daily changing temperature on the curling behavior and interface stress of slab track in construction stage, Construction and Building Materials, 185, 638-647.

Bishko, A. V., Samokrutov, A. A., Shevaldykin, V. G. (2008), Ultrasonic echo-pulse tomography of concrete suing shear waves low-frequency phased antenna arrays, 17th World Conference on Nondestructive Testing, 25-28, Oct 2008, Shanghai, China.

Haza, A. O., Samokrutov, A. A., Samokrutov, P. A. (2013), Assessment of concrete structures using the Mira and Eyecon ultrasonic shear wave devices and the SAFT-C image reconstruction technique, Construction and Building Materials, 38, 1276-1291.

Choi, P., Kim, D.-H., Lee, B.-H., Won, M. C. (2016), Application of ultrasonic shear-wave tomography to identify horizontal crack or delamination in concrete pavement and bridge, Construction and Building Materials, 121(15), 81-91.

Lin, S., Shams, S., Choi, H., Azari, H. (2018), Ultrasonic imaging of multi-layer concrete structures, NDT&E International, 98, 101-109.

Chen, R., Tran, K. T., La, H. M., Rawlinson, T., Dinh, K. (2022), Detection of delamination and rebar debonding in concrete structures with ultrasonic SH-waveform tomography, Automation in construction, 133(104004)

Kee, S.-H., Lee, J.-W. (2019), Comparison of non-destructive evaluation methods for condition assessment of TCL/HSB in railway concrete slab: ultrasonic tomography and multi-channel elastic wave measurements, Proceedings of the 2019 autumn conference and annual meeting of the Korean Society for Railway, KSR2019S130.

Marklein, R., Mayer, K., Hannemann, R., Krylow, T., Balasubramanian, K., Langenberg, K. J., Schmitz, V. (2002), Linear and nonlinear inversion algorithms applied in nondestructive evaluation, Inverse Problems, 18(6), 1733

Zhu, W.-F., Chen, X.-J., Li, Z.-W., Meng, X.-Z., Fan, G.-P., Shao, W., Zhang, H.-Y. (2019), A SAFT Method for the Detection of Void Defect inside a Ballastless Track Structure Using Ultrasonic Array Sensors, Sensors, 19(21), 4677

Otsu, N. (1979), A Threshold Selection Method from Gray-Level Histograms, IEEE Transactions on Systems, Man, and Cybernetics, 9(1), 62-66.