Rahimah, U., Martha, S. and Imro'ah, N. (2026) “K-Means Cluster with Calinski Harabasz Index Evaluation to Map Forest Degradation and Deforestation Areas”, Jurnal Matematika UNAND, 15(2), pp. 237–248. doi: 10.25077/jmua.15.2.237-248.2026.