Gureev, Viktor. “DEVELOPMENT OF THE ALGORITHMS AND PROGRAMS OF HIGH SPEED METHODS FOR THE CALCULATION OF LARGE ELECTRIC ENERGY SYSTEMS (ЕЕS) AND POWER UTILITIES OPERATION MODES FOR THE SIMULATORS”. Scientific Works of Vinnytsia National Technical University, no. 1 (June 29, 2018). Accessed October 17, 2021. https://works.vntu.edu.ua/index.php/works/article/view/523.