KYRYK, V.; BILYK, A. Monopolar mode of operation of HVDC in the main electric networks of Ukraine. Electrical Engineering and Power Engineering, [S. l.], n. 1, p. 24–31, 2020. DOI: 10.15588/1607-6761-2020-1-3. Disponível em: http://ee.zntu.edu.ua/article/view/203244. Acesso em: 3 may. 2024.