CIALDEA, R. Sonde radioattive a percorso ridotto. Annals of Geophysics, [S. l.], v. 1, n. 1, p. 49–55, 1948. DOI: 10.4401/ag-5994. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/5994. Acesso em: 19 oct. 2021.