MOORHEAD, Simon. Telephone Answering Machines. Journal of Telecommunications and the Digital Economy, [S. l.], v. 14, n. 1, p. 119–125, 2026. DOI: 10.18080/jtde.v14n1.1450. Disponível em: https://www.jtde.telsoc.org/index.php/jtde/article/view/1450. Acesso em: 17 apr. 2026.