S. Suro Mardjan, M. K. . Mitaray, S. Samsudin, Y. P. . Rahardjo, and J. . Firdaus, “Portable NIR Spectroscopy for Cocoa Bean Re-fermentation Analysis: A Rapid and Reliable Technique”, JTEP, vol. 13, no. 4, pp. 513–528, Dec. 2025, doi: 10.19028/jtep.013.4.513-528.