BALABANOV, B.; PETROV, G.; STANCHEVA, A. Dimensioning and evaluation of the radio frequency orbital resource. Yearbook Telecommunications, [S. l.], v. 3, p. 35–43, 2016. Disponível em: https://ojs.nbu.bg/index.php/YT/article/view/174. Acesso em: 4 may. 2024.