Optimizing Natural Dye Concentrations in Batik using Fuzzy k-means Clustering and m-polar Fuzzy Graphs: A Heritage Preservation Approach. - Brigitta Angelica Permata Chrisant; Widowati; Bayu Surarso; Bambang Irawanto; Kartono; Taleb Gaber; Eka Triyana (J. Intell. Fuzzy Syst., 2026)