Zaidi, F., Jamaludin, J., Othman, M., Ismail, I. and Tengku Abd Hafiz Pikry, T. M. K. (2026) “CONCEPTUAL MODELLING OF GOLD AUTHENTICATION SYSTEM BASED ON ULTRASOUND PROPAGATION ANALYSIS”, Journal of Engineering and Technology (JET), 17(1). doi: 10.54554/jet.2026.17.1.016.