Widyaningrum, W., Y. A. Purwanto, S. Widodo, S. Supijatno, and E. S. Iriani. “Portable Near-Infrared Spectroscopy and Support Vector Regression for Fast Quality Evaluation of Vanilla (Vanilla Planifolia)”. Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering), vol. 14, no. 2, Mar. 2025, pp. 515-26, doi:10.23960/jtep-l.v14i2.515-526.