Supratid, Siriporn, and Phichete Julrode. “A performance comparison using principal component analysis and differential evolution on fuzzy c-means and k-harmonic means”. Journal of Current Science and Technology 1, no. 2 (February 19, 2023): 127–137. accessed April 21, 2025. https://ph04.tci-thaijo.org/index.php/JCST/article/view/610.