BROVELLI, M. A.; MIGLIACCIO, F. The direct estimation of the potential coefficients by biorthogonal sequences. Annals of Geophysics, [S. l.], v. 36, n. 5-6, 1993. DOI: 10.4401/ag-4242. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/4242. Acesso em: 28 mar. 2024.