“Estimation of Technical Condition and Forecasting the Working Capacity of Power Transformers Based on the Fuzzy-Set Theory”. Visnyk of Vinnytsia Politechnical Institute, no. 2 (November 12, 2010): 83–87. Accessed October 11, 2026. https://visnyk.vntu.edu.ua/index.php/visnyk/article/view/1205.