“Implementation of an IoT Based Billing System to Optimize Management of Billiard Table Usage”. Journal of Innovation and Technology Polbeng Series on Informatics (INOVTEK Polbeng - Seri Informatika) 9, no. 2 (October 24, 2024): 778–789. Accessed July 8, 2026. http://210.79.191.38/index.php/ISI/article/view/160.