CAMPBELL, I. The Transformation of Telecom’s "Ugly Duckling". Journal of Telecommunications and the Digital Economy, [S. l.], v. 4, n. 3, p. 61–95, 2016. DOI: 10.18080/jtde.v4n3.61. Disponível em: https://mail.jtde.telsoc.org/index.php/jtde/article/view/61. Acesso em: 4 jul. 2024.