PETROV, G.; STANCHEVA, A.; KADREV, V. Specialized databases for spectrum managament research, analysis and forecasting of the effects of working electromagnetic fields. Yearbook Telecommunications, [S. l.], v. 1, p. 87–96, 2014. Disponível em: https://ojs.nbu.bg/index.php/YT/article/view/189. Acesso em: 26 dec. 2024.