Gunadi, Gunadi, and Rosalendro Eddy Nugroho. “Optimizing Preventive Maintenance for DC Battery Back-Up Systems in Gas Turbine Compressors”. Journal of Sustainable Economic and Business 3, no. 1 (January 30, 2026): 170–184. Accessed May 9, 2026. https://journal.arepublisher.com/index.php/joseb/article/view/347.