CASIMIRO, A.; AZEVEDO, J.; ECONOMOU, L.; HARALAMBOUS, H.; TULUNAY, E.; TULUNAY, Y.; BAHADIRLAR, Y.; TÜRK, A. S.; WARRINGTON, E. M. 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: 27 oct. 2021.