SYAHPUTRI, Z. .; SUTARMAN; MACHRANI ADI PUTRI SIREGAR. Determining The Optimal Number of K-Means Clusters Using The Calinski Harabasz Index and Krzanowski and Lai Index Methods for Groupsing Flood Prone Areas In North Sumatra. Sinkron : jurnal dan penelitian teknik informatika, [S. l.], v. 8, n. 1, p. 571-580, 2024. DOI: 10.33395/sinkron.v9i1.13246. Disponível em: https://jurnal.polgan.ac.id/index.php/sinkron/article/view/13246. Acesso em: 19 apr. 2026.