Samudro BR, Pratama YP. Investigating Performance Installation of Hospital Room Surgery of Six Hospitals in Special Region of Yogyakarta by Using Data Envelopment Analysis Model Constant Return to Scale. EKU [Internet]. 2018 Mar. 21 [cited 2026 May 6];13(1):1-10. Available from: https://journal.umpo.ac.id/index.php/ekuilibrium/article/view/893