Raulin, J. P., David P. Correia de Matos, R. Hadano, C. V. Saraiva, E. Correia, y P. Kaufmann. 2009. «The South America VLF NETwork (SAVNET): Development, Installation Status, First Results». Geofísica Internacional 48 (3):253-61. https://doi.org/10.22201/igeof.00167169p.2009.48.3.24.