Januar, Tri Wandi, et al. “Semi-Unsupervised Threshold-Based and Jenks Optimization Classification for Analyzing Urban Expansion in BSD City Using Multi-Temporal Landsat Data”. Jurnal Spatial Wahana Komunikasi Dan Informasi Geografi, vol. 25, no. 1, Mar. 2025, pp. 17-26, doi:10.21009/spatial.251.003.