W. H. Eng and Syed Zuhaib Haider Rizvi, “Characterization of Gemstones Using Nanoparticle Enhanced Laser Induced Breakdown Spectroscopy (NELIBS)”, EKST, vol. 4, no. 1, pp. 282–290, Aug. 2024, Accessed: Aug. 15, 2026. [Online]. Available: https://periodical.uthm.edu.my/index.php/ekst/article/view/14059