Istiadi, I., A. Y. . Rahman, and A. D. R. . Wisnu. “Identification of Tempe Fermentation Maturity Using Principal Component Analysis and K-Nearest Neighbor”. Sinkron : Jurnal Dan Penelitian Teknik Informatika, vol. 7, no. 1, Jan. 2023, pp. 286-94, doi:10.33395/sinkron.v8i1.12006.