Lezhnuk, Petro, Olexandre Rubanenko, і Oleg Kazmiruk. «OPTIMAL CONTROL OF ELECTRIC ENERGY SYSTEMS NORMAL MODES, TAKING INTO ACCOUNT TECHNICAL STATE OF ON-LOAD TAP-CHANGING TRANSFORMERS». Scientific Works of Vinnytsia National Technical University, no. 4 (Листопад 27, 2015). дата звернення Травень 28, 2026. https://works.vntu.edu.ua/index.php/works/article/view/352.