Fitri, N.A. et al. 2021. Grouping Districts/Cities in Kalimantan Island Based on The People’s Welfare Indicators Using Fuzzy C-Means and Subtractive Fuzzy C-Means Methods. Jurnal Matematika, Statistika dan Komputasi. 18, 1 (Sep. 2021), 141–149. DOI:https://doi.org/10.20956/j.v18i1.14416.