M. A. F. BIN MUSTAMAM, “Development of an Automated Sign face Cleaner (ASiC)”, rpmme, vol. 6, no. 1, pp. 167–172, Sep. 2025, Accessed: Aug. 15, 2026. [Online]. Available: https://periodical.uthm.edu.my/index.php/rpmme/article/view/16965