Zimniak, Marcin, Johannes Fliege, and Wolfgang Benn. “A New Approach to Cluster Visualization Methods Based on Self-Organizing Maps”. Applied Science and Engineering Progress 4, no. 4 (September 9, 2013): 61–68. accessed September 18, 2026. https://ph02.tci-thaijo.org/index.php/ijast/article/view/67354.