Pirniak, Viktor, Petro Lezhnuik, Olexandre Demov, і Yuriy Pivniuk. «CALCULATION OF ECONOMIC EQUIVALENTS OF REACTIVE POWER FOR THE NODES OF ELECTRIC GRID». Scientific Works of Vinnytsia National Technical University, no. 3 (Листопад 27, 2015). дата звернення Червень 20, 2026. https://works.vntu.edu.ua/index.php/works/article/view/383.