Sitompul, Melda Pita Uli, Opim Salim Sitompul, and Zakarias Situmorang. “Optimization of Determination Against K-Means Cluster Algorithm Using Elbow Creation”. Jurnal Teknik Informatika C.I.T Medicom 14, no. 1 (March 30, 2022): 1–9. Accessed May 26, 2026. https://medikom.iocspublisher.org/index.php/JTI/article/view/176.