SIMEONOVA, T. Analysis of types of communication services for 6G. Yearbook Telecommunications, [S. l.], v. 8, p. 35–46, 2021. DOI: 10.33919/YTelecomm.21.8.4. Disponível em: https://ojs.nbu.bg/index.php/YT/article/view/597. Acesso em: 2 jun. 2025.