SALEH, A. F. . Determining the Instantaneous Power Factor of an Electrical System by the use of Hilbert Transform. ـJournal of Engineering Research and Applied Science, [S. l.], v. 3, n. 1, 2016. Disponível em: https://ceh.edu.ly/JERAS/index.php/j/article/view/4. Acesso em: 17 aug. 2026.