“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”, JISTECH, vol. 12, no. 1, pp. 175–179, Jun. 2023, Accessed: Aug. 06, 2026. [Online]. Available: https://jistechunipa.com/index.php/istech/article/view/218