Maiyena, S., A. N. Mat Daud, and S. K. Ayop. “Elastic Properties Measurement of the Multi-Layered Materials Using the Pulse-Echo Immersion Technique”. Journal of Science and Mathematics Letters, vol. 13, no. 1, Jan. 2025, pp. 23-29, doi:10.37134/jsml.vol13.1.3.2025.