Lezhnuk, Petro, Olexandre Rubanenko, and 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 (November 27, 2015). Accessed April 25, 2024. https://works.vntu.edu.ua/index.php/works/article/view/352.