Aulia, Annisy Syahida, et al. “Rapid NIR-Based Prediction of Free Fatty Acid and Moisture Content in Intact Oil Palm Fruits Using PLSR and Hybrid PLS–ANN Models”. Jurnal Keteknikan Pertanian, vol. 14, no. 1, Apr. 2026, pp. 108-24, https://doi.org/10.19028/jtep.014.1.108-124.