Trianto, R., M. Muin, and C. Vikasari. “Optimized K-Means Clustering for Web Server Anomaly Detection Using Elbow Method and Security-Rule Enhancements”. Journal of Information Systems and Informatics, Vol. 7, no. 4, Dec. 2025, pp. 3601-25, doi:10.63158/journalisi.v7i4.1391.