R. N. Hartanto and S. Pertiwi, “Feasibility Analysis of Using NIR Spectroscopy to Predict Ripeness Parameters of Red Guava Fruit (Psidium guajava L.)”, JTEP, vol. 12, no. 2, pp. 230–241, Aug. 2024, doi: 10.19028/jtep.012.2.230-241.