Indriyani, C., S. Arbaynah, A. P. Wijaya, L. Oktaviani, F. Yumna, N. Othman, S. D. Oktarina, and Rahma Anisa. “Optimization of Fuzzy C-Means Clustering With Particle Swarm Optimization on Socioeconomic Indicators of ASEAN Countries”. 2025. Indonesian Journal of Statistics and Its Applications, vol. 9, no. 2, May 2026, pp. 274-88, doi:10.29244/ijsa.v9i2p274-288.