A. Budiyanto, M. Romli, E. Anggraeni, E. I. Wiloso, and M. Hadipernata, “Clustering in Chemical Characteristics and Contaminant Metal Levels of Indonesian Sago Starch: A Comprehensive Analysis of Purity and Quality”, sci. technol. indones., vol. 11, no. 3, pp. 758–772, Jun. 2026.