FERRARI, G. Letters in the earth sciences: written in the past useful in the future. Annals of Geophysics, [S. l.], v. 52, n. 6, p. 523–537, 2009. DOI: 10.4401/ag-4609. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/4609. Acesso em: 6 oct. 2022.