“Comparison of Strategies of Preventive and Corrective Maintenance of Uninterruptible Power Supply”. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 54 (September 28, 2013): 111–119. Accessed April 1, 2025. https://radap.kpi.ua/radiotechnique/article/view/682.