“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): 175-79. http://jistech.unipa.ac.id/index.php/istech/article/view/218.