GREGORY, M. A. Universal Service in the Spotlight. Journal of Telecommunications and the Digital Economy, [S. l.], v. 3, n. 4, p. ii-v, 2015. DOI: 10.18080/jtde.v3n4.39. Disponível em: https://mail.jtde.telsoc.org/index.php/jtde/article/view/39. Acesso em: 4 jul. 2024.