Arruda, A., D. Brasil, P. Issouribehere, M.T. Torres, S.M. Rios, and P. Ribeiro M. Samotyj. 1995. “Power Quality Issues in South America: Presentt Reality and Future Opportunities”. Revista De Ingeniería 1 (6): 10-15. https://doi.org/10.16924/revinge.6.2.