Setiawan, Luthfi Frans, and Edi Widodo. “Analyisis Of Boiler Reliability Maintenance System With Availability Ratio At PT. XXX: Analisa Sistem Perawatan Keandalan Boiler Dengan Rasio Availability Di PT. XXX”. Procedia of Engineering and Life Science 5 (February 23, 2024): 125–131. Accessed June 28, 2025. https://pels.umsida.ac.id/index.php/PELS/article/view/1569.