“Enhanced Efficiency of Coffee Fruit Ripe Sorting System through Ultrasound-based Optimization and Fuzzy Logic: Peningkatan Efisiensi Sistem Sortasi Matang Buah Kopi melalui Optimasi Berbasis Ultrasound dan Logika Fuzzy” (2023) JISTECH: Journal of Information Science and Technology, 12(1), pp. 175–179. Available at: http://jistech.unipa.ac.id/index.php/istech/article/view/218 (Accessed: 28 September 2026).