GUNASHEKAR, S. D.; WARRINGTON, E. M.; STRANGEWAYS, H. J.; ERHEL, Y.; SALOUS, S.; FEENEY, S. M.; ABBASI, N. M.; BERTEL, L.; LEMUR, D.; MARIE, F.; OGER, M. Utilization of antenna arrays in HF systems. Annals of Geophysics, [S. l.], v. 52, n. 3-4, p. 323–338, 2009. DOI: 10.4401/ag-4578. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/4578. Acesso em: 27 oct. 2021.