CASIMIRO, António; AZEVEDO, Joaquim; ECONOMOU, Lefteris; HARALAMBOUS, Haris; TULUNAY, Ersin; TULUNAY, Yurdanur; BAHADIRLAR, Yildirim; TÜRK, A. Serdar; WARRINGTON, E. Michael. HF spectrum occupancy and antennas. Annals of Geophysics, [S. l.], v. 52, n. 3-4, p. 339–357, 2009. DOI: 10.4401/ag-4581. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/4581. Acesso em: 30 apr. 2026.