Saari, M. M., N. A. Nadzri, A. M. Halil, M. Ishak, K. Sakai, T. Kiwa, and K. Tsukada. “Design of Eddy Current Testing Probe for Surface Defect Evaluation”. International Journal of Automotive and Mechanical Engineering, vol. 16, no. 1, Mar. 2019, pp. 6357-6, doi:10.15282/ijame.16.1.2019.19.0481.