ZAIDI, F.; JAMALUDIN, J.; OTHMAN, M.; ISMAIL, I.; TENGKU ABD HAFIZ PIKRY, T. M. K. CONCEPTUAL MODELLING OF GOLD AUTHENTICATION SYSTEM BASED ON ULTRASOUND PROPAGATION ANALYSIS. Journal of Engineering and Technology (JET), [S. l.], v. 17, n. 1, 2026. DOI: 10.54554/jet.2026.17.1.016. Disponível em: https://jet.utem.edu.my/jet/article/view/6762. Acesso em: 6 aug. 2026.