PETKOVA, M.; KADREV, V. Telecommunications behind NGN - the new networks of the future NWGN (New Generation Networks). Yearbook Telecommunications, [S. l.], v. 1, p. 1–7, 2014. Disponível em: https://ojs.nbu.bg/index.php/YT/article/view/184. Acesso em: 23 nov. 2024.