STRUŻAK, Ryszard; TJELTA, Terje; BORREGO, Jose P. On Radio-Frequency Spectrum Management. Journal of Telecommunications and Information Technology, Warsaw, Poland, v. 65, n. 3, p. 108–130, 2016. DOI: 10.26636/jtit.2016.3.755. Disponível em: https://jtit.pl/jtit/article/view/755. Acesso em: 17 jul. 2026.