Agus Arip Munawar, Yusmanizar. “Near Infrared Technology: Fast and Non-Destructive Approach to Predict Inner Quality Parameters of Intact Coffee Beans”. International Journal of Advanced Science and Technology, Vol. 29, no. 3, Mar. 2020, pp. 10405 -, http://sersc.org/journals/index.php/IJAST/article/view/27116.