[1]
Zuccheretti, E., Tutone, G., Sciacca, U., Bianchi, C. and Baskaradas, J.A. 2003. The new AIS-INGV digital ionosonde. Annals of Geophysics. 46, 4 (Dec. 2003), 647–659. DOI:https://doi.org/10.4401/ag-4377.