Sagala, Noviyanti T. M., and Alexander Agung Santoso Gunawan. “Discovering the Optimal Number of Crime Cluster Using Elbow, Silhouette, Gap Statistics, and NbClust Methods”. ComTech: Computer, Mathematics and Engineering Applications 13, no. 1 (February 3, 2022): 1-10. Accessed April 1, 2025. https://journal.binus.ac.id/index.php/comtech/article/view/7270.