Sudarwan, Achmad Nurohim, Dominicus Sutrisno Hadi, Tantri Yanuar Rahmat Syah, and Eka Angga laksana. “Health Service Process: Lean Six Sigma Concept for Hospitals (Casemix Hospitals)”. International Journal of Psychosocial Rehabilitation 24, no. 1 (February 29, 2020): 3494–3505. Accessed July 30, 2025. https://psychosocial.com/index.php/ijpr/article/view/626.