Wiwil Dzil Izzatil et al. 2025. Grouping of Regencies/Cities In West Sumatra Province Based On Economic Development Indicators Using The Self-Organizing Maps (SOM) Algorithm. Jurnal MSA ( Matematika dan Statistika serta Aplikasinya). 13, 2 (Oct. 2025), 64–72. DOI:https://doi.org/10.24252/msa.v13i2.57741.