Chua, Hui Ling, and Audrey Huong. “Piezoelectric Photoacoustic System for Fluid Flow Monitoring”. International Journal of Integrated Engineering 12, no. 7 (October 26, 2020): 204–210. Accessed August 7, 2026. https://journal.uthm.edu.my/index.php/ijie/article/view/7275.