YI, T.; WANG, C.-M.; SUN, W.-Q.; ZHANG, Y. Research of Power System Closest Voltage Collapse Boundary. Elektronika ir Elektrotechnika, [S. l.], v. 19, n. 10, p. 33-36, 2013. DOI: 10.5755/j01.eee.19.10.5890. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/5890. Acesso em: 5 oct. 2022.