GREGORY, Mark A. Regional Mobile Telecommunications Performance. Journal of Telecommunications and the Digital Economy, [S. l.], v. 9, n. 3, p. 170–185, 2021. DOI: 10.18080/jtde.v9n3.444. Disponível em: https://www.jtde.telsoc.org/index.php/jtde/article/view/444. Acesso em: 26 oct. 2025.