Lee Kuan Yong, and Syed Zuhaib. “Investigating Wastewater Pollution Using Laser-Induced Breakdown Spectroscopy”. Enhanced Knowledge in Sciences and Technology, vol. 4, no. 1, Aug. 2024, pp. 247-55, https://penerbit.uthm.edu.my/periodicals/index.php/ekst/article/view/14643.